diff --git a/demos/dashboard/index.html b/demos/dashboard/index.html
index fb64372..6db5197 100644
--- a/demos/dashboard/index.html
+++ b/demos/dashboard/index.html
@@ -14,8 +14,8 @@
   <script src="/fengui/demos/js/jquery-3.5.1.slim.min.js"></script>
   <script src="/fengui/demos/js/popper.min.js"></script>
   <script src="/fengui/demos/js/bootstrap.min.js"></script>
-  <script src="/socket.io/socket.io.js"></script>
-  <script src="/dist/RTCMultiConnection.min.js"></script>
+  <script src="/fengui/dist/socket.io.js"></script>
+  <script src="/fengui/dist/RTCMultiConnection.js"></script>
 
 <style type="text/css">
 html, body, section, ul, li, nav, a, h1, h2 {
diff --git a/demos/index.html b/demos/index.html
index 401511a..1f82c5b 100644
--- a/demos/index.html
+++ b/demos/index.html
@@ -1,7 +1,14 @@
 <!DOCTYPE html>
 <html lang="en" dir="ltr">
 <head>
-
+    <title>File Sharing using RTCMultiConnection</title>
+    
+    <script>
+      if (!location.hash.replace('#', '').length) {
+        location.href = location.href.split('#')[0] + '#' + (Math.random() * 100).toString().replace('.', '');
+        location.reload();
+      }
+    </script>
   <meta charset="utf-8">
   <title>RTCMultiConnection Demos</title>
   <link rel="canonical" href="/fengui/demos/">
diff --git a/dist/FileBufferReader.js b/dist/FileBufferReader.js
new file mode 100644
index 0000000..b1ae45d
--- /dev/null
+++ b/dist/FileBufferReader.js
@@ -0,0 +1,1236 @@
+// Last time updated: 2017-08-27 5:48:35 AM UTC
+
+// ________________
+// FileBufferReader
+
+// Open-Sourced: https://github.com/muaz-khan/FileBufferReader
+
+// --------------------------------------------------
+// Muaz Khan     - www.MuazKhan.com
+// MIT License   - www.WebRTC-Experiment.com/licence
+// --------------------------------------------------
+
+'use strict';
+
+(function() {
+
+    function FileBufferReader() {
+        var fbr = this;
+        var fbrHelper = new FileBufferReaderHelper();
+
+        fbr.chunks = {};
+        fbr.users = {};
+
+        fbr.readAsArrayBuffer = function(file, callback, extra) {
+            var options = {
+                file: file,
+                earlyCallback: function(chunk) {
+                    callback(fbrClone(chunk, {
+                        currentPosition: -1
+                    }));
+                },
+                extra: extra || {
+                    userid: 0
+                }
+            };
+
+            if (file.extra && Object.keys(file.extra).length) {
+                Object.keys(file.extra).forEach(function(key) {
+                    options.extra[key] = file.extra[key];
+                });
+            }
+
+            fbrHelper.readAsArrayBuffer(fbr, options);
+        };
+
+        fbr.getNextChunk = function(fileUUID, callback, userid) {
+            var currentPosition;
+
+            if (typeof fileUUID.currentPosition !== 'undefined') {
+                currentPosition = fileUUID.currentPosition;
+                fileUUID = fileUUID.uuid;
+            }
+
+            var allFileChunks = fbr.chunks[fileUUID];
+            if (!allFileChunks) {
+                return;
+            }
+
+            if (typeof userid !== 'undefined') {
+                if (!fbr.users[userid + '']) {
+                    fbr.users[userid + ''] = {
+                        fileUUID: fileUUID,
+                        userid: userid,
+                        currentPosition: -1
+                    };
+                }
+
+                if (typeof currentPosition !== 'undefined') {
+                    fbr.users[userid + ''].currentPosition = currentPosition;
+                }
+
+                fbr.users[userid + ''].currentPosition++;
+                currentPosition = fbr.users[userid + ''].currentPosition;
+            } else {
+                if (typeof currentPosition !== 'undefined') {
+                    fbr.chunks[fileUUID].currentPosition = currentPosition;
+                }
+
+                fbr.chunks[fileUUID].currentPosition++;
+                currentPosition = fbr.chunks[fileUUID].currentPosition;
+            }
+
+            var nextChunk = allFileChunks[currentPosition];
+            if (!nextChunk) {
+                delete fbr.chunks[fileUUID];
+                fbr.convertToArrayBuffer({
+                    chunkMissing: true,
+                    currentPosition: currentPosition,
+                    uuid: fileUUID
+                }, callback);
+                return;
+            }
+
+            nextChunk = fbrClone(nextChunk);
+
+            if (typeof userid !== 'undefined') {
+                nextChunk.remoteUserId = userid + '';
+            }
+
+            if (!!nextChunk.start) {
+                fbr.onBegin(nextChunk);
+            }
+
+            if (!!nextChunk.end) {
+                fbr.onEnd(nextChunk);
+            }
+
+            fbr.onProgress(nextChunk);
+
+            fbr.convertToArrayBuffer(nextChunk, function(buffer) {
+                if (nextChunk.currentPosition == nextChunk.maxChunks) {
+                    callback(buffer, true);
+                    return;
+                }
+
+                callback(buffer, false);
+            });
+        };
+
+        var fbReceiver = new FileBufferReceiver(fbr);
+
+        fbr.addChunk = function(chunk, callback) {
+            if (!chunk) {
+                return;
+            }
+
+            fbReceiver.receive(chunk, function(chunk) {
+                fbr.convertToArrayBuffer({
+                    readyForNextChunk: true,
+                    currentPosition: chunk.currentPosition,
+                    uuid: chunk.uuid
+                }, callback);
+            });
+        };
+
+        fbr.chunkMissing = function(chunk) {
+            delete fbReceiver.chunks[chunk.uuid];
+            delete fbReceiver.chunksWaiters[chunk.uuid];
+        };
+
+        fbr.onBegin = function() {};
+        fbr.onEnd = function() {};
+        fbr.onProgress = function() {};
+
+        fbr.convertToObject = FileConverter.ConvertToObject;
+        fbr.convertToArrayBuffer = FileConverter.ConvertToArrayBuffer
+
+        // for backward compatibility----it is redundant.
+        fbr.setMultipleUsers = function() {};
+
+        // extends 'from' object with members from 'to'. If 'to' is null, a deep clone of 'from' is returned
+        function fbrClone(from, to) {
+            if (from == null || typeof from != "object") return from;
+            if (from.constructor != Object && from.constructor != Array) return from;
+            if (from.constructor == Date || from.constructor == RegExp || from.constructor == Function ||
+                from.constructor == String || from.constructor == Number || from.constructor == Boolean)
+                return new from.constructor(from);
+
+            to = to || new from.constructor();
+
+            for (var name in from) {
+                to[name] = typeof to[name] == "undefined" ? fbrClone(from[name], null) : to[name];
+            }
+
+            return to;
+        }
+    }
+
+    function FileBufferReaderHelper() {
+        var fbrHelper = this;
+
+        function processInWebWorker(_function) {
+            var blob = URL.createObjectURL(new Blob([_function.toString(),
+                'this.onmessage =  function (e) {' + _function.name + '(e.data);}'
+            ], {
+                type: 'application/javascript'
+            }));
+
+            var worker = new Worker(blob);
+            return worker;
+        }
+
+        fbrHelper.readAsArrayBuffer = function(fbr, options) {
+            var earlyCallback = options.earlyCallback;
+            delete options.earlyCallback;
+
+            function processChunk(chunk) {
+                if (!fbr.chunks[chunk.uuid]) {
+                    fbr.chunks[chunk.uuid] = {
+                        currentPosition: -1
+                    };
+                }
+
+                options.extra = options.extra || {
+                    userid: 0
+                };
+
+                chunk.userid = options.userid || options.extra.userid || 0;
+                chunk.extra = options.extra;
+
+                fbr.chunks[chunk.uuid][chunk.currentPosition] = chunk;
+
+                if (chunk.end && earlyCallback) {
+                    earlyCallback(chunk.uuid);
+                    earlyCallback = null;
+                }
+
+                // for huge files
+                if ((chunk.maxChunks > 200 && chunk.currentPosition == 200) && earlyCallback) {
+                    earlyCallback(chunk.uuid);
+                    earlyCallback = null;
+                }
+            }
+            if (false && typeof Worker !== 'undefined') {
+                var webWorker = processInWebWorker(fileReaderWrapper);
+
+                webWorker.onmessage = function(event) {
+                    processChunk(event.data);
+                };
+
+                webWorker.postMessage(options);
+            } else {
+                fileReaderWrapper(options, processChunk);
+            }
+        };
+
+        function fileReaderWrapper(options, callback) {
+            callback = callback || function(chunk) {
+                postMessage(chunk);
+            };
+
+            var file = options.file;
+            if (!file.uuid) {
+                file.uuid = (Math.random() * 100).toString().replace(/\./g, '');
+            }
+
+            var chunkSize = options.chunkSize || 15 * 1000;
+            if (options.extra && options.extra.chunkSize) {
+                chunkSize = options.extra.chunkSize;
+            }
+
+            var sliceId = 0;
+            var cacheSize = chunkSize;
+
+            var chunksPerSlice = Math.floor(Math.min(100000000, cacheSize) / chunkSize);
+            var sliceSize = chunksPerSlice * chunkSize;
+            var maxChunks = Math.ceil(file.size / chunkSize);
+
+            file.maxChunks = maxChunks;
+
+            var numOfChunksInSlice;
+            var currentPosition = 0;
+            var hasEntireFile;
+            var chunks = [];
+
+            callback({
+                currentPosition: currentPosition,
+                uuid: file.uuid,
+                maxChunks: maxChunks,
+                size: file.size,
+                name: file.name,
+                type: file.type,
+                lastModifiedDate: (file.lastModifiedDate || new Date()).toString(),
+                start: true
+            });
+
+            var blob, reader = new FileReader();
+
+            reader.onloadend = function(evt) {
+                if (evt.target.readyState == FileReader.DONE) {
+                    addChunks(file.name, evt.target.result, function() {
+                        sliceId++;
+                        if ((sliceId + 1) * sliceSize < file.size) {
+                            blob = file.slice(sliceId * sliceSize, (sliceId + 1) * sliceSize);
+                            reader.readAsArrayBuffer(blob);
+                        } else if (sliceId * sliceSize < file.size) {
+                            blob = file.slice(sliceId * sliceSize, file.size);
+                            reader.readAsArrayBuffer(blob);
+                        } else {
+                            file.url = URL.createObjectURL(file);
+                            callback({
+                                currentPosition: currentPosition,
+                                uuid: file.uuid,
+                                maxChunks: maxChunks,
+                                size: file.size,
+                                name: file.name,
+                                lastModifiedDate: (file.lastModifiedDate || new Date()).toString(),
+                                url: URL.createObjectURL(file),
+                                type: file.type,
+                                end: true
+                            });
+                        }
+                    });
+                }
+            };
+
+            currentPosition += 1;
+
+            blob = file.slice(sliceId * sliceSize, (sliceId + 1) * sliceSize);
+            reader.readAsArrayBuffer(blob);
+
+            function addChunks(fileName, binarySlice, addChunkCallback) {
+                numOfChunksInSlice = Math.ceil(binarySlice.byteLength / chunkSize);
+                for (var i = 0; i < numOfChunksInSlice; i++) {
+                    var start = i * chunkSize;
+                    chunks[currentPosition] = binarySlice.slice(start, Math.min(start + chunkSize, binarySlice.byteLength));
+
+                    callback({
+                        uuid: file.uuid,
+                        buffer: chunks[currentPosition],
+                        currentPosition: currentPosition,
+                        maxChunks: maxChunks,
+
+                        size: file.size,
+                        name: file.name,
+                        lastModifiedDate: (file.lastModifiedDate || new Date()).toString(),
+                        type: file.type
+                    });
+
+                    currentPosition++;
+                }
+
+                if (currentPosition == maxChunks) {
+                    hasEntireFile = true;
+                }
+
+                addChunkCallback();
+            }
+        }
+    }
+
+    function FileSelector() {
+        var selector = this;
+
+        var noFileSelectedCallback = function() {};
+
+        selector.selectSingleFile = function(callback, failure) {
+            if (failure) {
+                noFileSelectedCallback = failure;
+            }
+
+            selectFile(callback);
+        };
+        selector.selectMultipleFiles = function(callback, failure) {
+            if (failure) {
+                noFileSelectedCallback = failure;
+            }
+
+            selectFile(callback, true);
+        };
+        selector.selectDirectory = function(callback, failure) {
+            if (failure) {
+                noFileSelectedCallback = failure;
+            }
+
+            selectFile(callback, true, true);
+        };
+
+        selector.accept = '*.*';
+
+        function selectFile(callback, multiple, directory) {
+            callback = callback || function() {};
+
+            var file = document.createElement('input');
+            file.type = 'file';
+
+            if (multiple) {
+                file.multiple = true;
+            }
+
+            if (directory) {
+                file.webkitdirectory = true;
+            }
+
+            file.accept = selector.accept;
+
+            file.onclick = function() {
+                file.clickStarted = true;
+            };
+
+            document.body.onfocus = function() {
+                setTimeout(function() {
+                    if (!file.clickStarted) return;
+                    file.clickStarted = false;
+
+                    if (!file.value) {
+                        noFileSelectedCallback();
+                    }
+                }, 500);
+            };
+
+            file.onchange = function() {
+                if (multiple) {
+                    if (!file.files.length) {
+                        console.error('No file selected.');
+                        return;
+                    }
+
+                    var arr = [];
+                    Array.from(file.files).forEach(function(file) {
+                        file.url = file.webkitRelativePath;
+                        arr.push(file);
+                    });
+                    callback(arr);
+                    return;
+                }
+
+                if (!file.files[0]) {
+                    console.error('No file selected.');
+                    return;
+                }
+
+                callback(file.files[0]);
+
+                file.parentNode.removeChild(file);
+            };
+            file.style.display = 'none';
+            (document.body || document.documentElement).appendChild(file);
+            fireClickEvent(file);
+        }
+
+        function getValidFileName(fileName) {
+            if (!fileName) {
+                fileName = 'file' + (new Date).toISOString().replace(/:|\.|-/g, '')
+            }
+
+            var a = fileName;
+            a = a.replace(/^.*[\\\/]([^\\\/]*)$/i, "$1");
+            a = a.replace(/\s/g, "_");
+            a = a.replace(/,/g, '');
+            a = a.toLowerCase();
+            return a;
+        }
+
+        function fireClickEvent(element) {
+            if (typeof element.click === 'function') {
+                element.click();
+                return;
+            }
+
+            if (typeof element.change === 'function') {
+                element.change();
+                return;
+            }
+
+            if (typeof document.createEvent('Event') !== 'undefined') {
+                var event = document.createEvent('Event');
+
+                if (typeof event.initEvent === 'function' && typeof element.dispatchEvent === 'function') {
+                    event.initEvent('click', true, true);
+                    element.dispatchEvent(event);
+                    return;
+                }
+            }
+
+            var event = new MouseEvent('click', {
+                view: window,
+                bubbles: true,
+                cancelable: true
+            });
+
+            element.dispatchEvent(event);
+        }
+    }
+
+    function FileBufferReceiver(fbr) {
+        var fbReceiver = this;
+
+        fbReceiver.chunks = {};
+        fbReceiver.chunksWaiters = {};
+
+        function receive(chunk, callback) {
+            if (!chunk.uuid) {
+                fbr.convertToObject(chunk, function(object) {
+                    receive(object);
+                });
+                return;
+            }
+
+            if (chunk.start && !fbReceiver.chunks[chunk.uuid]) {
+                fbReceiver.chunks[chunk.uuid] = {};
+                if (fbr.onBegin) fbr.onBegin(chunk);
+            }
+
+            if (!chunk.end && chunk.buffer) {
+                fbReceiver.chunks[chunk.uuid][chunk.currentPosition] = chunk.buffer;
+            }
+
+            if (chunk.end) {
+                var chunksObject = fbReceiver.chunks[chunk.uuid];
+                var chunksArray = [];
+                Object.keys(chunksObject).forEach(function(item, idx) {
+                    chunksArray.push(chunksObject[item]);
+                });
+
+                var blob = new Blob(chunksArray, {
+                    type: chunk.type
+                });
+                blob = merge(blob, chunk);
+                blob.url = URL.createObjectURL(blob);
+                blob.uuid = chunk.uuid;
+
+                if (!blob.size) console.error('Something went wrong. Blob Size is 0.');
+
+                if (fbr.onEnd) fbr.onEnd(blob);
+
+                // clear system memory
+                delete fbReceiver.chunks[chunk.uuid];
+                delete fbReceiver.chunksWaiters[chunk.uuid];
+            }
+
+            if (chunk.buffer && fbr.onProgress) fbr.onProgress(chunk);
+
+            if (!chunk.end) {
+                callback(chunk);
+
+                fbReceiver.chunksWaiters[chunk.uuid] = function() {
+                    function looper() {
+                        if (!chunk.buffer) {
+                            return;
+                        }
+
+                        if (!fbReceiver.chunks[chunk.uuid]) {
+                            return;
+                        }
+
+                        if (chunk.currentPosition != chunk.maxChunks && !fbReceiver.chunks[chunk.uuid][chunk.currentPosition]) {
+                            callback(chunk);
+                            setTimeout(looper, 5000);
+                        }
+                    }
+                    setTimeout(looper, 5000);
+                };
+
+                fbReceiver.chunksWaiters[chunk.uuid]();
+            }
+        }
+
+        fbReceiver.receive = receive;
+    }
+
+    var FileConverter = {
+        ConvertToArrayBuffer: function(object, callback) {
+            binarize.pack(object, function(dataView) {
+                callback(dataView.buffer);
+            });
+        },
+        ConvertToObject: function(buffer, callback) {
+            binarize.unpack(buffer, callback);
+        }
+    };
+
+    function merge(mergein, mergeto) {
+        if (!mergein) mergein = {};
+        if (!mergeto) return mergein;
+
+        for (var item in mergeto) {
+            try {
+                mergein[item] = mergeto[item];
+            } catch (e) {}
+        }
+        return mergein;
+    }
+
+    var debug = false;
+
+    var BIG_ENDIAN = false,
+        LITTLE_ENDIAN = true,
+        TYPE_LENGTH = Uint8Array.BYTES_PER_ELEMENT,
+        LENGTH_LENGTH = Uint16Array.BYTES_PER_ELEMENT,
+        BYTES_LENGTH = Uint32Array.BYTES_PER_ELEMENT;
+
+    var Types = {
+        NULL: 0,
+        UNDEFINED: 1,
+        STRING: 2,
+        NUMBER: 3,
+        BOOLEAN: 4,
+        ARRAY: 5,
+        OBJECT: 6,
+        INT8ARRAY: 7,
+        INT16ARRAY: 8,
+        INT32ARRAY: 9,
+        UINT8ARRAY: 10,
+        UINT16ARRAY: 11,
+        UINT32ARRAY: 12,
+        FLOAT32ARRAY: 13,
+        FLOAT64ARRAY: 14,
+        ARRAYBUFFER: 15,
+        BLOB: 16,
+        FILE: 16,
+        BUFFER: 17 // Special type for node.js
+    };
+
+    if (debug) {
+        var TypeNames = [
+            'NULL',
+            'UNDEFINED',
+            'STRING',
+            'NUMBER',
+            'BOOLEAN',
+            'ARRAY',
+            'OBJECT',
+            'INT8ARRAY',
+            'INT16ARRAY',
+            'INT32ARRAY',
+            'UINT8ARRAY',
+            'UINT16ARRAY',
+            'UINT32ARRAY',
+            'FLOAT32ARRAY',
+            'FLOAT64ARRAY',
+            'ARRAYBUFFER',
+            'BLOB',
+            'BUFFER'
+        ];
+    }
+
+    var Length = [
+        null, // Types.NULL
+        null, // Types.UNDEFINED
+        'Uint16', // Types.STRING
+        'Float64', // Types.NUMBER
+        'Uint8', // Types.BOOLEAN
+        null, // Types.ARRAY
+        null, // Types.OBJECT
+        'Int8', // Types.INT8ARRAY
+        'Int16', // Types.INT16ARRAY
+        'Int32', // Types.INT32ARRAY
+        'Uint8', // Types.UINT8ARRAY
+        'Uint16', // Types.UINT16ARRAY
+        'Uint32', // Types.UINT32ARRAY
+        'Float32', // Types.FLOAT32ARRAY
+        'Float64', // Types.FLOAT64ARRAY
+        'Uint8', // Types.ARRAYBUFFER
+        'Uint8', // Types.BLOB, Types.FILE
+        'Uint8' // Types.BUFFER
+    ];
+
+    var binary_dump = function(view, start, length) {
+        var table = [],
+            endianness = BIG_ENDIAN,
+            ROW_LENGTH = 40;
+        table[0] = [];
+        for (var i = 0; i < ROW_LENGTH; i++) {
+            table[0][i] = i < 10 ? '0' + i.toString(10) : i.toString(10);
+        }
+        for (i = 0; i < length; i++) {
+            var code = view.getUint8(start + i, endianness);
+            var index = ~~(i / ROW_LENGTH) + 1;
+            if (typeof table[index] === 'undefined') table[index] = [];
+            table[index][i % ROW_LENGTH] = code < 16 ? '0' + code.toString(16) : code.toString(16);
+        }
+        console.log('%c' + table[0].join(' '), 'font-weight: bold;');
+        for (i = 1; i < table.length; i++) {
+            console.log(table[i].join(' '));
+        }
+    };
+
+    var find_type = function(obj) {
+        var type = undefined;
+
+        if (obj === undefined) {
+            type = Types.UNDEFINED;
+
+        } else if (obj === null) {
+            type = Types.NULL;
+
+        } else {
+            var const_name = obj.constructor.name;
+            var const_name_reflection = obj.constructor.toString().match(/\w+/g)[1];
+            if (const_name !== undefined && Types[const_name.toUpperCase()] !== undefined) {
+                // return type by .constructor.name if possible
+                type = Types[const_name.toUpperCase()];
+
+            } else if (const_name_reflection !== undefined && Types[const_name_reflection.toUpperCase()] !== undefined) {
+                type = Types[const_name_reflection.toUpperCase()];
+
+            } else {
+                // Work around when constructor.name is not defined
+                switch (typeof obj) {
+                    case 'string':
+                        type = Types.STRING;
+                        break;
+
+                    case 'number':
+                        type = Types.NUMBER;
+                        break;
+
+                    case 'boolean':
+                        type = Types.BOOLEAN;
+                        break;
+
+                    case 'object':
+                        if (obj instanceof Array) {
+                            type = Types.ARRAY;
+
+                        } else if (obj instanceof Int8Array) {
+                            type = Types.INT8ARRAY;
+
+                        } else if (obj instanceof Int16Array) {
+                            type = Types.INT16ARRAY;
+
+                        } else if (obj instanceof Int32Array) {
+                            type = Types.INT32ARRAY;
+
+                        } else if (obj instanceof Uint8Array) {
+                            type = Types.UINT8ARRAY;
+
+                        } else if (obj instanceof Uint16Array) {
+                            type = Types.UINT16ARRAY;
+
+                        } else if (obj instanceof Uint32Array) {
+                            type = Types.UINT32ARRAY;
+
+                        } else if (obj instanceof Float32Array) {
+                            type = Types.FLOAT32ARRAY;
+
+                        } else if (obj instanceof Float64Array) {
+                            type = Types.FLOAT64ARRAY;
+
+                        } else if (obj instanceof ArrayBuffer) {
+                            type = Types.ARRAYBUFFER;
+
+                        } else if (obj instanceof Blob) { // including File
+                            type = Types.BLOB;
+
+                        } else if (obj instanceof Buffer) { // node.js only
+                            type = Types.BUFFER;
+
+                        } else if (obj instanceof Object) {
+                            type = Types.OBJECT;
+
+                        }
+                        break;
+
+                    default:
+                        break;
+                }
+            }
+        }
+        return type;
+    };
+
+    var utf16_utf8 = function(string) {
+        return unescape(encodeURIComponent(string));
+    };
+
+    var utf8_utf16 = function(bytes) {
+        return decodeURIComponent(escape(bytes));
+    };
+
+    /**
+     * packs seriarized elements array into a packed ArrayBuffer
+     * @param  {Array} serialized Serialized array of elements.
+     * @return {DataView} view of packed binary
+     */
+    var pack = function(serialized) {
+        var cursor = 0,
+            i = 0,
+            j = 0,
+            endianness = BIG_ENDIAN;
+
+        var ab = new ArrayBuffer(serialized[0].byte_length + serialized[0].header_size);
+        var view = new DataView(ab);
+
+        for (i = 0; i < serialized.length; i++) {
+            var start = cursor,
+                header_size = serialized[i].header_size,
+                type = serialized[i].type,
+                length = serialized[i].length,
+                value = serialized[i].value,
+                byte_length = serialized[i].byte_length,
+                type_name = Length[type],
+                unit = type_name === null ? 0 : window[type_name + 'Array'].BYTES_PER_ELEMENT;
+
+            // Set type
+            if (type === Types.BUFFER) {
+                // on node.js Blob is emulated using Buffer type
+                view.setUint8(cursor, Types.BLOB, endianness);
+            } else {
+                view.setUint8(cursor, type, endianness);
+            }
+            cursor += TYPE_LENGTH;
+
+            if (debug) {
+                console.info('Packing', type, TypeNames[type]);
+            }
+
+            // Set length if required
+            if (type === Types.ARRAY || type === Types.OBJECT) {
+                view.setUint16(cursor, length, endianness);
+                cursor += LENGTH_LENGTH;
+
+                if (debug) {
+                    console.info('Content Length', length);
+                }
+            }
+
+            // Set byte length
+            view.setUint32(cursor, byte_length, endianness);
+            cursor += BYTES_LENGTH;
+
+            if (debug) {
+                console.info('Header Size', header_size, 'bytes');
+                console.info('Byte Length', byte_length, 'bytes');
+            }
+
+            switch (type) {
+                case Types.NULL:
+                case Types.UNDEFINED:
+                    // NULL and UNDEFINED doesn't have any payload
+                    break;
+
+                case Types.STRING:
+                    if (debug) {
+                        console.info('Actual Content %c"' + value + '"', 'font-weight:bold;');
+                    }
+                    for (j = 0; j < length; j++, cursor += unit) {
+                        view.setUint16(cursor, value.charCodeAt(j), endianness);
+                    }
+                    break;
+
+                case Types.NUMBER:
+                case Types.BOOLEAN:
+                    if (debug) {
+                        console.info('%c' + value.toString(), 'font-weight:bold;');
+                    }
+                    view['set' + type_name](cursor, value, endianness);
+                    cursor += unit;
+                    break;
+
+                case Types.INT8ARRAY:
+                case Types.INT16ARRAY:
+                case Types.INT32ARRAY:
+                case Types.UINT8ARRAY:
+                case Types.UINT16ARRAY:
+                case Types.UINT32ARRAY:
+                case Types.FLOAT32ARRAY:
+                case Types.FLOAT64ARRAY:
+                    var _view = new Uint8Array(view.buffer, cursor, byte_length);
+                    _view.set(new Uint8Array(value.buffer));
+                    cursor += byte_length;
+                    break;
+
+                case Types.ARRAYBUFFER:
+                case Types.BUFFER:
+                    var _view = new Uint8Array(view.buffer, cursor, byte_length);
+                    _view.set(new Uint8Array(value));
+                    cursor += byte_length;
+                    break;
+
+                case Types.BLOB:
+                case Types.ARRAY:
+                case Types.OBJECT:
+                    break;
+
+                default:
+                    throw 'TypeError: Unexpected type found.';
+            }
+
+            if (debug) {
+                binary_dump(view, start, cursor - start);
+            }
+        }
+
+        return view;
+    };
+
+    /**
+     * Unpack binary data into an object with value and cursor
+     * @param  {DataView} view [description]
+     * @param  {Number} cursor [description]
+     * @return {Object}
+     */
+    var unpack = function(view, cursor) {
+        var i = 0,
+            endianness = BIG_ENDIAN,
+            start = cursor;
+        var type, length, byte_length, value, elem;
+
+        // Retrieve "type"
+        type = view.getUint8(cursor, endianness);
+        cursor += TYPE_LENGTH;
+
+        if (debug) {
+            console.info('Unpacking', type, TypeNames[type]);
+        }
+
+        // Retrieve "length"
+        if (type === Types.ARRAY || type === Types.OBJECT) {
+            length = view.getUint16(cursor, endianness);
+            cursor += LENGTH_LENGTH;
+
+            if (debug) {
+                console.info('Content Length', length);
+            }
+        }
+
+        // Retrieve "byte_length"
+        byte_length = view.getUint32(cursor, endianness);
+        cursor += BYTES_LENGTH;
+
+        if (debug) {
+            console.info('Byte Length', byte_length, 'bytes');
+        }
+
+        var type_name = Length[type];
+        var unit = type_name === null ? 0 : window[type_name + 'Array'].BYTES_PER_ELEMENT;
+
+        switch (type) {
+            case Types.NULL:
+            case Types.UNDEFINED:
+                if (debug) {
+                    binary_dump(view, start, cursor - start);
+                }
+                // NULL and UNDEFINED doesn't have any octet
+                value = null;
+                break;
+
+            case Types.STRING:
+                length = byte_length / unit;
+                var string = [];
+                for (i = 0; i < length; i++) {
+                    var code = view.getUint16(cursor, endianness);
+                    cursor += unit;
+                    string.push(String.fromCharCode(code));
+                }
+                value = string.join('');
+                if (debug) {
+                    console.info('Actual Content %c"' + value + '"', 'font-weight:bold;');
+                    binary_dump(view, start, cursor - start);
+                }
+                break;
+
+            case Types.NUMBER:
+                value = view.getFloat64(cursor, endianness);
+                cursor += unit;
+                if (debug) {
+                    console.info('Actual Content %c"' + value.toString() + '"', 'font-weight:bold;');
+                    binary_dump(view, start, cursor - start);
+                }
+                break;
+
+            case Types.BOOLEAN:
+                value = view.getUint8(cursor, endianness) === 1 ? true : false;
+                cursor += unit;
+                if (debug) {
+                    console.info('Actual Content %c"' + value.toString() + '"', 'font-weight:bold;');
+                    binary_dump(view, start, cursor - start);
+                }
+                break;
+
+            case Types.INT8ARRAY:
+            case Types.INT16ARRAY:
+            case Types.INT32ARRAY:
+            case Types.UINT8ARRAY:
+            case Types.UINT16ARRAY:
+            case Types.UINT32ARRAY:
+            case Types.FLOAT32ARRAY:
+            case Types.FLOAT64ARRAY:
+            case Types.ARRAYBUFFER:
+                elem = view.buffer.slice(cursor, cursor + byte_length);
+                cursor += byte_length;
+
+                // If ArrayBuffer
+                if (type === Types.ARRAYBUFFER) {
+                    value = elem;
+
+                    // If other TypedArray
+                } else {
+                    value = new window[type_name + 'Array'](elem);
+                }
+
+                if (debug) {
+                    binary_dump(view, start, cursor - start);
+                }
+                break;
+
+            case Types.BLOB:
+                if (debug) {
+                    binary_dump(view, start, cursor - start);
+                }
+                // If Blob is available (on browser)
+                if (window.Blob) {
+                    var mime = unpack(view, cursor);
+                    var buffer = unpack(view, mime.cursor);
+                    cursor = buffer.cursor;
+                    value = new Blob([buffer.value], {
+                        type: mime.value
+                    });
+                } else {
+                    // node.js implementation goes here
+                    elem = view.buffer.slice(cursor, cursor + byte_length);
+                    cursor += byte_length;
+                    // node.js implementatino uses Buffer to help Blob
+                    value = new Buffer(elem);
+                }
+                break;
+
+            case Types.ARRAY:
+                if (debug) {
+                    binary_dump(view, start, cursor - start);
+                }
+                value = [];
+                for (i = 0; i < length; i++) {
+                    // Retrieve array element
+                    elem = unpack(view, cursor);
+                    cursor = elem.cursor;
+                    value.push(elem.value);
+                }
+                break;
+
+            case Types.OBJECT:
+                if (debug) {
+                    binary_dump(view, start, cursor - start);
+                }
+                value = {};
+                for (i = 0; i < length; i++) {
+                    // Retrieve object key and value in sequence
+                    var key = unpack(view, cursor);
+                    var val = unpack(view, key.cursor);
+                    cursor = val.cursor;
+                    value[key.value] = val.value;
+                }
+                break;
+
+            default:
+                throw 'TypeError: Type not supported.';
+        }
+        return {
+            value: value,
+            cursor: cursor
+        };
+    };
+
+    /**
+     * deferred function to process multiple serialization in order
+     * @param  {array}   array    [description]
+     * @param  {Function} callback [description]
+     * @return {void} no return value
+     */
+    var deferredSerialize = function(array, callback) {
+        var length = array.length,
+            results = [],
+            count = 0,
+            byte_length = 0;
+        for (var i = 0; i < array.length; i++) {
+            (function(index) {
+                serialize(array[index], function(result) {
+                    // store results in order
+                    results[index] = result;
+                    // count byte length
+                    byte_length += result[0].header_size + result[0].byte_length;
+                    // when all results are on table
+                    if (++count === length) {
+                        // finally concatenate all reuslts into a single array in order
+                        var array = [];
+                        for (var j = 0; j < results.length; j++) {
+                            array = array.concat(results[j]);
+                        }
+                        callback(array, byte_length);
+                    }
+                });
+            })(i);
+        }
+    };
+
+    /**
+     * Serializes object and return byte_length
+     * @param  {mixed} obj JavaScript object you want to serialize
+     * @return {Array} Serialized array object
+     */
+    var serialize = function(obj, callback) {
+        var subarray = [],
+            unit = 1,
+            header_size = TYPE_LENGTH + BYTES_LENGTH,
+            type, byte_length = 0,
+            length = 0,
+            value = obj;
+
+        type = find_type(obj);
+
+        unit = Length[type] === undefined || Length[type] === null ? 0 :
+            window[Length[type] + 'Array'].BYTES_PER_ELEMENT;
+
+        switch (type) {
+            case Types.UNDEFINED:
+            case Types.NULL:
+                break;
+
+            case Types.NUMBER:
+            case Types.BOOLEAN:
+                byte_length = unit;
+                break;
+
+            case Types.STRING:
+                length = obj.length;
+                byte_length += length * unit;
+                break;
+
+            case Types.INT8ARRAY:
+            case Types.INT16ARRAY:
+            case Types.INT32ARRAY:
+            case Types.UINT8ARRAY:
+            case Types.UINT16ARRAY:
+            case Types.UINT32ARRAY:
+            case Types.FLOAT32ARRAY:
+            case Types.FLOAT64ARRAY:
+                length = obj.length;
+                byte_length += length * unit;
+                break;
+
+            case Types.ARRAY:
+                deferredSerialize(obj, function(subarray, byte_length) {
+                    callback([{
+                        type: type,
+                        length: obj.length,
+                        header_size: header_size + LENGTH_LENGTH,
+                        byte_length: byte_length,
+                        value: null
+                    }].concat(subarray));
+                });
+                return;
+
+            case Types.OBJECT:
+                var deferred = [];
+                for (var key in obj) {
+                    if (obj.hasOwnProperty(key)) {
+                        deferred.push(key);
+                        deferred.push(obj[key]);
+                        length++;
+                    }
+                }
+                deferredSerialize(deferred, function(subarray, byte_length) {
+                    callback([{
+                        type: type,
+                        length: length,
+                        header_size: header_size + LENGTH_LENGTH,
+                        byte_length: byte_length,
+                        value: null
+                    }].concat(subarray));
+                });
+                return;
+
+            case Types.ARRAYBUFFER:
+                byte_length += obj.byteLength;
+                break;
+
+            case Types.BLOB:
+                var mime_type = obj.type;
+                var reader = new FileReader();
+                reader.onload = function(e) {
+                    deferredSerialize([mime_type, e.target.result], function(subarray, byte_length) {
+                        callback([{
+                            type: type,
+                            length: length,
+                            header_size: header_size,
+                            byte_length: byte_length,
+                            value: null
+                        }].concat(subarray));
+                    });
+                };
+                reader.onerror = function(e) {
+                    throw 'FileReader Error: ' + e;
+                };
+                reader.readAsArrayBuffer(obj);
+                return;
+
+            case Types.BUFFER:
+                byte_length += obj.length;
+                break;
+
+            default:
+                throw 'TypeError: Type "' + obj.constructor.name + '" not supported.';
+        }
+
+        callback([{
+            type: type,
+            length: length,
+            header_size: header_size,
+            byte_length: byte_length,
+            value: value
+        }].concat(subarray));
+    };
+
+    /**
+     * Deserialize binary and return JavaScript object
+     * @param  ArrayBuffer buffer ArrayBuffer you want to deserialize
+     * @return mixed              Retrieved JavaScript object
+     */
+    var deserialize = function(buffer, callback) {
+        var view = buffer instanceof DataView ? buffer : new DataView(buffer);
+        var result = unpack(view, 0);
+        return result.value;
+    };
+
+    if (debug) {
+        window.Test = {
+            BIG_ENDIAN: BIG_ENDIAN,
+            LITTLE_ENDIAN: LITTLE_ENDIAN,
+            Types: Types,
+            pack: pack,
+            unpack: unpack,
+            serialize: serialize,
+            deserialize: deserialize
+        };
+    }
+
+    var binarize = {
+        pack: function(obj, callback) {
+            try {
+                if (debug) console.info('%cPacking Start', 'font-weight: bold; color: red;', obj);
+                serialize(obj, function(array) {
+                    if (debug) console.info('Serialized Object', array);
+                    callback(pack(array));
+                });
+            } catch (e) {
+                throw e;
+            }
+        },
+        unpack: function(buffer, callback) {
+            try {
+                if (debug) console.info('%cUnpacking Start', 'font-weight: bold; color: red;', buffer);
+                var result = deserialize(buffer);
+                if (debug) console.info('Deserialized Object', result);
+                callback(result);
+            } catch (e) {
+                throw e;
+            }
+        }
+    };
+
+    window.FileConverter = FileConverter;
+    window.FileSelector = FileSelector;
+    window.FileBufferReader = FileBufferReader;
+})();
diff --git a/dist/RTCMultiConnection.min.js b/dist/RTCMultiConnection.min.js
index fe34604..939445d 100644
--- a/dist/RTCMultiConnection.min.js
+++ b/dist/RTCMultiConnection.min.js
@@ -1,9 +1,9 @@
 'use strict';
 
-// Last time updated: 2020-08-26 8:55:14 AM UTC
+// Last time updated: 2019-06-15 4:26:11 PM UTC
 
 // _________________________
-// RTCMultiConnection v3.7.0
+// RTCMultiConnection v3.6.9
 
 // Open-Sourced: https://github.com/muaz-khan/RTCMultiConnection
 
@@ -12,7 +12,7 @@
 // MIT License   - www.WebRTC-Experiment.com/licence
 // --------------------------------------------------
 
-"use strict";var RTCMultiConnection=function(roomid,forceOptions){function SocketConnection(connection,connectCallback){function isData(session){return!session.audio&&!session.video&&!session.screen&&session.data}function updateExtraBackup(remoteUserId,extra){connection.peersBackup[remoteUserId]||(connection.peersBackup[remoteUserId]={userid:remoteUserId,extra:{}}),connection.peersBackup[remoteUserId].extra=extra}function onMessageEvent(message){if(message.remoteUserId==connection.userid){if(connection.peers[message.sender]&&connection.peers[message.sender].extra!=message.message.extra&&(connection.peers[message.sender].extra=message.extra,connection.onExtraDataUpdated({userid:message.sender,extra:message.extra}),updateExtraBackup(message.sender,message.extra)),message.message.streamSyncNeeded&&connection.peers[message.sender]){var stream=connection.streamEvents[message.message.streamid];if(!stream||!stream.stream)return;var action=message.message.action;if("ended"===action||"inactive"===action||"stream-removed"===action)return connection.peersBackup[stream.userid]&&(stream.extra=connection.peersBackup[stream.userid].extra),void connection.onstreamended(stream);var type="both"!=message.message.type?message.message.type:null;return void("function"==typeof stream.stream[action]&&stream.stream[action](type))}if("dropPeerConnection"===message.message)return void connection.deletePeer(message.sender);if(message.message.allParticipants)return message.message.allParticipants.indexOf(message.sender)===-1&&message.message.allParticipants.push(message.sender),void message.message.allParticipants.forEach(function(participant){mPeer[connection.peers[participant]?"renegotiatePeer":"createNewPeer"](participant,{localPeerSdpConstraints:{OfferToReceiveAudio:connection.sdpConstraints.mandatory.OfferToReceiveAudio,OfferToReceiveVideo:connection.sdpConstraints.mandatory.OfferToReceiveVideo},remotePeerSdpConstraints:{OfferToReceiveAudio:connection.session.oneway?!!connection.session.audio:connection.sdpConstraints.mandatory.OfferToReceiveAudio,OfferToReceiveVideo:connection.session.oneway?!!connection.session.video||!!connection.session.screen:connection.sdpConstraints.mandatory.OfferToReceiveVideo},isOneWay:!!connection.session.oneway||"one-way"===connection.direction,isDataOnly:isData(connection.session)})});if(message.message.newParticipant){if(message.message.newParticipant==connection.userid)return;if(connection.peers[message.message.newParticipant])return;return void mPeer.createNewPeer(message.message.newParticipant,message.message.userPreferences||{localPeerSdpConstraints:{OfferToReceiveAudio:connection.sdpConstraints.mandatory.OfferToReceiveAudio,OfferToReceiveVideo:connection.sdpConstraints.mandatory.OfferToReceiveVideo},remotePeerSdpConstraints:{OfferToReceiveAudio:connection.session.oneway?!!connection.session.audio:connection.sdpConstraints.mandatory.OfferToReceiveAudio,OfferToReceiveVideo:connection.session.oneway?!!connection.session.video||!!connection.session.screen:connection.sdpConstraints.mandatory.OfferToReceiveVideo},isOneWay:!!connection.session.oneway||"one-way"===connection.direction,isDataOnly:isData(connection.session)})}if(message.message.readyForOffer&&(connection.attachStreams.length&&(connection.waitingForLocalMedia=!1),connection.waitingForLocalMedia))return void setTimeout(function(){onMessageEvent(message)},1);if(message.message.newParticipationRequest&&message.sender!==connection.userid){connection.peers[message.sender]&&connection.deletePeer(message.sender);var userPreferences={extra:message.extra||{},localPeerSdpConstraints:message.message.remotePeerSdpConstraints||{OfferToReceiveAudio:connection.sdpConstraints.mandatory.OfferToReceiveAudio,OfferToReceiveVideo:connection.sdpConstraints.mandatory.OfferToReceiveVideo},remotePeerSdpConstraints:message.message.localPeerSdpConstraints||{OfferToReceiveAudio:connection.session.oneway?!!connection.session.audio:connection.sdpConstraints.mandatory.OfferToReceiveAudio,OfferToReceiveVideo:connection.session.oneway?!!connection.session.video||!!connection.session.screen:connection.sdpConstraints.mandatory.OfferToReceiveVideo},isOneWay:"undefined"!=typeof message.message.isOneWay?message.message.isOneWay:!!connection.session.oneway||"one-way"===connection.direction,isDataOnly:"undefined"!=typeof message.message.isDataOnly?message.message.isDataOnly:isData(connection.session),dontGetRemoteStream:"undefined"!=typeof message.message.isOneWay?message.message.isOneWay:!!connection.session.oneway||"one-way"===connection.direction,dontAttachLocalStream:!!message.message.dontGetRemoteStream,connectionDescription:message,successCallback:function(){}};return void connection.onNewParticipant(message.sender,userPreferences)}return message.message.changedUUID&&connection.peers[message.message.oldUUID]&&(connection.peers[message.message.newUUID]=connection.peers[message.message.oldUUID],delete connection.peers[message.message.oldUUID]),message.message.userLeft?(mPeer.onUserLeft(message.sender),void(message.message.autoCloseEntireSession&&connection.leave())):void mPeer.addNegotiatedMessage(message.message,message.sender)}}var parameters="";parameters+="?userid="+connection.userid,parameters+="&sessionid="+connection.sessionid,parameters+="&msgEvent="+connection.socketMessageEvent,parameters+="&socketCustomEvent="+connection.socketCustomEvent,parameters+="&autoCloseEntireSession="+!!connection.autoCloseEntireSession,connection.session.broadcast===!0&&(parameters+="&oneToMany=true"),parameters+="&maxParticipantsAllowed="+connection.maxParticipantsAllowed,connection.enableScalableBroadcast&&(parameters+="&enableScalableBroadcast=true",parameters+="&maxRelayLimitPerUser="+(connection.maxRelayLimitPerUser||2)),parameters+="&extra="+JSON.stringify(connection.extra||{}),connection.socketCustomParameters&&(parameters+=connection.socketCustomParameters);try{io.sockets={}}catch(e){}if(connection.socketURL||(connection.socketURL="/"),"/"!=connection.socketURL.substr(connection.socketURL.length-1,1))throw'"socketURL" MUST end with a slash.';connection.enableLogs&&("/"==connection.socketURL?console.info("socket.io url is: ",location.origin+"/"):console.info("socket.io url is: ",connection.socketURL));try{connection.socket=io(connection.socketURL+parameters)}catch(e){connection.socket=io.connect(connection.socketURL+parameters,connection.socketOptions)}var mPeer=connection.multiPeersHandler;connection.socket.on("extra-data-updated",function(remoteUserId,extra){connection.peers[remoteUserId]&&(connection.peers[remoteUserId].extra=extra,connection.onExtraDataUpdated({userid:remoteUserId,extra:extra}),updateExtraBackup(remoteUserId,extra))}),connection.socket.on(connection.socketMessageEvent,onMessageEvent);var alreadyConnected=!1;connection.socket.resetProps=function(){alreadyConnected=!1},connection.socket.on("connect",function(){alreadyConnected||(alreadyConnected=!0,connection.enableLogs&&console.info("socket.io connection is opened."),setTimeout(function(){connection.socket.emit("extra-data-updated",connection.extra)},1e3),connectCallback&&connectCallback(connection.socket))}),connection.socket.on("disconnect",function(event){connection.onSocketDisconnect(event)}),connection.socket.on("error",function(event){connection.onSocketError(event)}),connection.socket.on("user-disconnected",function(remoteUserId){remoteUserId!==connection.userid&&(connection.onUserStatusChanged({userid:remoteUserId,status:"offline",extra:connection.peers[remoteUserId]?connection.peers[remoteUserId].extra||{}:{}}),connection.deletePeer(remoteUserId))}),connection.socket.on("user-connected",function(userid){userid!==connection.userid&&connection.onUserStatusChanged({userid:userid,status:"online",extra:connection.peers[userid]?connection.peers[userid].extra||{}:{}})}),connection.socket.on("closed-entire-session",function(sessionid,extra){connection.leave(),connection.onEntireSessionClosed({sessionid:sessionid,userid:sessionid,extra:extra})}),connection.socket.on("userid-already-taken",function(useridAlreadyTaken,yourNewUserId){connection.onUserIdAlreadyTaken(useridAlreadyTaken,yourNewUserId)}),connection.socket.on("logs",function(log){connection.enableLogs&&console.debug("server-logs",log)}),connection.socket.on("number-of-broadcast-viewers-updated",function(data){connection.onNumberOfBroadcastViewersUpdated(data)}),connection.socket.on("set-isInitiator-true",function(sessionid){sessionid==connection.sessionid&&(connection.isInitiator=!0)})}function MultiPeers(connection){function initFileBufferReader(){connection.fbr=new FileBufferReader,connection.fbr.onProgress=function(chunk){connection.onFileProgress(chunk)},connection.fbr.onBegin=function(file){connection.onFileStart(file)},connection.fbr.onEnd=function(file){connection.onFileEnd(file)}}var self=this,skipPeers=["getAllParticipants","getLength","selectFirst","streams","send","forEach"];connection.peers={getLength:function(){var numberOfPeers=0;for(var peer in this)skipPeers.indexOf(peer)==-1&&numberOfPeers++;return numberOfPeers},selectFirst:function(){var firstPeer;for(var peer in this)skipPeers.indexOf(peer)==-1&&(firstPeer=this[peer]);return firstPeer},getAllParticipants:function(sender){var allPeers=[];for(var peer in this)skipPeers.indexOf(peer)==-1&&peer!=sender&&allPeers.push(peer);return allPeers},forEach:function(callback){this.getAllParticipants().forEach(function(participant){callback(connection.peers[participant])})},send:function(data,remoteUserId){var that=this;if(!isNull(data.size)&&!isNull(data.type)){if(connection.enableFileSharing)return void self.shareFile(data,remoteUserId);"string"!=typeof data&&(data=JSON.stringify(data))}if(!("text"===data.type||data instanceof ArrayBuffer||data instanceof DataView))return void TextSender.send({text:data,channel:this,connection:connection,remoteUserId:remoteUserId});if("text"===data.type&&(data=JSON.stringify(data)),remoteUserId){var remoteUser=connection.peers[remoteUserId];if(remoteUser)return remoteUser.channels.length?void remoteUser.channels.forEach(function(channel){channel.send(data)}):(connection.peers[remoteUserId].createDataChannel(),connection.renegotiate(remoteUserId),void setTimeout(function(){that.send(data,remoteUserId)},3e3))}this.getAllParticipants().forEach(function(participant){return that[participant].channels.length?void that[participant].channels.forEach(function(channel){channel.send(data)}):(connection.peers[participant].createDataChannel(),connection.renegotiate(participant),void setTimeout(function(){that[participant].channels.forEach(function(channel){channel.send(data)})},3e3))})}},this.uuid=connection.userid,this.getLocalConfig=function(remoteSdp,remoteUserId,userPreferences){return userPreferences||(userPreferences={}),{streamsToShare:userPreferences.streamsToShare||{},rtcMultiConnection:connection,connectionDescription:userPreferences.connectionDescription,userid:remoteUserId,localPeerSdpConstraints:userPreferences.localPeerSdpConstraints,remotePeerSdpConstraints:userPreferences.remotePeerSdpConstraints,dontGetRemoteStream:!!userPreferences.dontGetRemoteStream,dontAttachLocalStream:!!userPreferences.dontAttachLocalStream,renegotiatingPeer:!!userPreferences.renegotiatingPeer,peerRef:userPreferences.peerRef,channels:userPreferences.channels||[],onLocalSdp:function(localSdp){self.onNegotiationNeeded(localSdp,remoteUserId)},onLocalCandidate:function(localCandidate){localCandidate=OnIceCandidateHandler.processCandidates(connection,localCandidate),localCandidate&&self.onNegotiationNeeded(localCandidate,remoteUserId)},remoteSdp:remoteSdp,onDataChannelMessage:function(message){if(!connection.fbr&&connection.enableFileSharing&&initFileBufferReader(),"string"==typeof message||!connection.enableFileSharing)return void self.onDataChannelMessage(message,remoteUserId);var that=this;return message instanceof ArrayBuffer||message instanceof DataView?void connection.fbr.convertToObject(message,function(object){that.onDataChannelMessage(object)}):message.readyForNextChunk?void connection.fbr.getNextChunk(message,function(nextChunk,isLastChunk){connection.peers[remoteUserId].channels.forEach(function(channel){channel.send(nextChunk)})},remoteUserId):message.chunkMissing?void connection.fbr.chunkMissing(message):void connection.fbr.addChunk(message,function(promptNextChunk){connection.peers[remoteUserId].peer.channel.send(promptNextChunk)})},onDataChannelError:function(error){self.onDataChannelError(error,remoteUserId)},onDataChannelOpened:function(channel){self.onDataChannelOpened(channel,remoteUserId)},onDataChannelClosed:function(event){self.onDataChannelClosed(event,remoteUserId)},onRemoteStream:function(stream){connection.peers[remoteUserId]&&connection.peers[remoteUserId].streams.push(stream),self.onGettingRemoteMedia(stream,remoteUserId)},onRemoteStreamRemoved:function(stream){self.onRemovingRemoteMedia(stream,remoteUserId)},onPeerStateChanged:function(states){self.onPeerStateChanged(states),"new"===states.iceConnectionState&&self.onNegotiationStarted(remoteUserId,states),"connected"===states.iceConnectionState&&self.onNegotiationCompleted(remoteUserId,states),states.iceConnectionState.search(/closed|failed/gi)!==-1&&(self.onUserLeft(remoteUserId),self.disconnectWith(remoteUserId))}}},this.createNewPeer=function(remoteUserId,userPreferences){if(!(connection.maxParticipantsAllowed<=connection.getAllParticipants().length)){if(userPreferences=userPreferences||{},connection.isInitiator&&connection.session.audio&&"two-way"===connection.session.audio&&!userPreferences.streamsToShare&&(userPreferences.isOneWay=!1,userPreferences.isDataOnly=!1,userPreferences.session=connection.session),!userPreferences.isOneWay&&!userPreferences.isDataOnly)return userPreferences.isOneWay=!0,void this.onNegotiationNeeded({enableMedia:!0,userPreferences:userPreferences},remoteUserId);userPreferences=connection.setUserPreferences(userPreferences,remoteUserId);var localConfig=this.getLocalConfig(null,remoteUserId,userPreferences);connection.peers[remoteUserId]=new PeerInitiator(localConfig)}},this.createAnsweringPeer=function(remoteSdp,remoteUserId,userPreferences){userPreferences=connection.setUserPreferences(userPreferences||{},remoteUserId);var localConfig=this.getLocalConfig(remoteSdp,remoteUserId,userPreferences);connection.peers[remoteUserId]=new PeerInitiator(localConfig)},this.renegotiatePeer=function(remoteUserId,userPreferences,remoteSdp){if(!connection.peers[remoteUserId])return void(connection.enableLogs&&console.error("Peer ("+remoteUserId+") does not exist. Renegotiation skipped."));userPreferences||(userPreferences={}),userPreferences.renegotiatingPeer=!0,userPreferences.peerRef=connection.peers[remoteUserId].peer,userPreferences.channels=connection.peers[remoteUserId].channels;var localConfig=this.getLocalConfig(remoteSdp,remoteUserId,userPreferences);connection.peers[remoteUserId]=new PeerInitiator(localConfig)},this.replaceTrack=function(track,remoteUserId,isVideoTrack){if(!connection.peers[remoteUserId])throw"This peer ("+remoteUserId+") does not exist.";var peer=connection.peers[remoteUserId].peer;return peer.getSenders&&"function"==typeof peer.getSenders&&peer.getSenders().length?void peer.getSenders().forEach(function(rtpSender){isVideoTrack&&"video"===rtpSender.track.kind&&(connection.peers[remoteUserId].peer.lastVideoTrack=rtpSender.track,rtpSender.replaceTrack(track)),isVideoTrack||"audio"!==rtpSender.track.kind||(connection.peers[remoteUserId].peer.lastAudioTrack=rtpSender.track,rtpSender.replaceTrack(track))}):(console.warn("RTPSender.replaceTrack is NOT supported."),void this.renegotiatePeer(remoteUserId))},this.onNegotiationNeeded=function(message,remoteUserId){},this.addNegotiatedMessage=function(message,remoteUserId){if(message.type&&message.sdp)return"answer"==message.type&&connection.peers[remoteUserId]&&connection.peers[remoteUserId].addRemoteSdp(message),"offer"==message.type&&(message.renegotiatingPeer?this.renegotiatePeer(remoteUserId,null,message):this.createAnsweringPeer(message,remoteUserId)),void(connection.enableLogs&&console.log("Remote peer's sdp:",message.sdp));if(message.candidate)return connection.peers[remoteUserId]&&connection.peers[remoteUserId].addRemoteCandidate(message),void(connection.enableLogs&&console.log("Remote peer's candidate pairs:",message.candidate));if(message.enableMedia){connection.session=message.userPreferences.session||connection.session,connection.session.oneway&&connection.attachStreams.length&&(connection.attachStreams=[]),message.userPreferences.isDataOnly&&connection.attachStreams.length&&(connection.attachStreams.length=[]);var streamsToShare={};connection.attachStreams.forEach(function(stream){streamsToShare[stream.streamid]={isAudio:!!stream.isAudio,isVideo:!!stream.isVideo,isScreen:!!stream.isScreen}}),message.userPreferences.streamsToShare=streamsToShare,self.onNegotiationNeeded({readyForOffer:!0,userPreferences:message.userPreferences},remoteUserId)}message.readyForOffer&&connection.onReadyForOffer(remoteUserId,message.userPreferences)},this.onGettingRemoteMedia=function(stream,remoteUserId){},this.onRemovingRemoteMedia=function(stream,remoteUserId){},this.onGettingLocalMedia=function(localStream){},this.onLocalMediaError=function(error,constraints){connection.onMediaError(error,constraints)},this.shareFile=function(file,remoteUserId){initFileBufferReader(),connection.fbr.readAsArrayBuffer(file,function(uuid){var arrayOfUsers=connection.getAllParticipants();remoteUserId&&(arrayOfUsers=[remoteUserId]),arrayOfUsers.forEach(function(participant){connection.fbr.getNextChunk(uuid,function(nextChunk){connection.peers[participant].channels.forEach(function(channel){channel.send(nextChunk)})},participant)})},{userid:connection.userid,chunkSize:"Firefox"===DetectRTC.browser.name?15e3:connection.chunkSize||0})};var textReceiver=new TextReceiver(connection);this.onDataChannelMessage=function(message,remoteUserId){textReceiver.receive(JSON.parse(message),remoteUserId,connection.peers[remoteUserId]?connection.peers[remoteUserId].extra:{})},this.onDataChannelClosed=function(event,remoteUserId){event.userid=remoteUserId,event.extra=connection.peers[remoteUserId]?connection.peers[remoteUserId].extra:{},connection.onclose(event)},this.onDataChannelError=function(error,remoteUserId){error.userid=remoteUserId,event.extra=connection.peers[remoteUserId]?connection.peers[remoteUserId].extra:{},connection.onerror(error)},this.onDataChannelOpened=function(channel,remoteUserId){return connection.peers[remoteUserId].channels.length?void(connection.peers[remoteUserId].channels=[channel]):(connection.peers[remoteUserId].channels.push(channel),void connection.onopen({userid:remoteUserId,extra:connection.peers[remoteUserId]?connection.peers[remoteUserId].extra:{},channel:channel}))},this.onPeerStateChanged=function(state){connection.onPeerStateChanged(state)},this.onNegotiationStarted=function(remoteUserId,states){},this.onNegotiationCompleted=function(remoteUserId,states){},this.getRemoteStreams=function(remoteUserId){return remoteUserId=remoteUserId||connection.peers.getAllParticipants()[0],connection.peers[remoteUserId]?connection.peers[remoteUserId].streams:[]}}function fireEvent(obj,eventName,args){if("undefined"!=typeof CustomEvent){var eventDetail={arguments:args,__exposedProps__:args},event=new CustomEvent(eventName,eventDetail);obj.dispatchEvent(event)}}function setHarkEvents(connection,streamEvent){if(streamEvent.stream&&getTracks(streamEvent.stream,"audio").length){if(!connection||!streamEvent)throw"Both arguments are required.";if(connection.onspeaking&&connection.onsilence){if("undefined"==typeof hark)throw"hark.js not found.";hark(streamEvent.stream,{onspeaking:function(){connection.onspeaking(streamEvent)},onsilence:function(){connection.onsilence(streamEvent)},onvolumechange:function(volume,threshold){connection.onvolumechange&&connection.onvolumechange(merge({volume:volume,threshold:threshold},streamEvent))}})}}}function setMuteHandlers(connection,streamEvent){streamEvent.stream&&streamEvent.stream&&streamEvent.stream.addEventListener&&(streamEvent.stream.addEventListener("mute",function(event){event=connection.streamEvents[streamEvent.streamid],event.session={audio:"audio"===event.muteType,video:"video"===event.muteType},connection.onmute(event)},!1),streamEvent.stream.addEventListener("unmute",function(event){event=connection.streamEvents[streamEvent.streamid],event.session={audio:"audio"===event.unmuteType,video:"video"===event.unmuteType},connection.onunmute(event)},!1))}function getRandomString(){if(window.crypto&&window.crypto.getRandomValues&&navigator.userAgent.indexOf("Safari")===-1){for(var a=window.crypto.getRandomValues(new Uint32Array(3)),token="",i=0,l=a.length;i<l;i++)token+=a[i].toString(36);return token}return(Math.random()*(new Date).getTime()).toString(36).replace(/\./g,"")}function getRMCMediaElement(stream,callback,connection){if(!connection.autoCreateMediaElement)return void callback({});var isAudioOnly=!1;getTracks(stream,"video").length||stream.isVideo||stream.isScreen||(isAudioOnly=!0),"Firefox"===DetectRTC.browser.name&&(connection.session.video||connection.session.screen)&&(isAudioOnly=!1);var mediaElement=document.createElement(isAudioOnly?"audio":"video");if(mediaElement.srcObject=stream,mediaElement.setAttribute("autoplay",!0),mediaElement.setAttribute("playsinline",!0),mediaElement.setAttribute("controls",!0),mediaElement.setAttribute("muted",!1),mediaElement.setAttribute("volume",1),"Firefox"===DetectRTC.browser.name){var streamEndedEvent="ended";"oninactive"in mediaElement&&(streamEndedEvent="inactive"),mediaElement.addEventListener(streamEndedEvent,function(){if(currentUserMediaRequest.remove(stream.idInstance),"local"===stream.type){streamEndedEvent="ended","oninactive"in stream&&(streamEndedEvent="inactive"),StreamsHandler.onSyncNeeded(stream.streamid,streamEndedEvent),connection.attachStreams.forEach(function(aStream,idx){stream.streamid===aStream.streamid&&delete connection.attachStreams[idx]});var newStreamsArray=[];connection.attachStreams.forEach(function(aStream){aStream&&newStreamsArray.push(aStream)}),connection.attachStreams=newStreamsArray;var streamEvent=connection.streamEvents[stream.streamid];if(streamEvent)return void connection.onstreamended(streamEvent);this.parentNode&&this.parentNode.removeChild(this)}},!1)}var played=mediaElement.play();if("undefined"!=typeof played){var cbFired=!1;setTimeout(function(){cbFired||(cbFired=!0,callback(mediaElement))},1e3),played.then(function(){cbFired||(cbFired=!0,callback(mediaElement))})["catch"](function(error){cbFired||(cbFired=!0,callback(mediaElement))})}else callback(mediaElement)}function listenEventHandler(eventName,eventHandler){window.removeEventListener(eventName,eventHandler),window.addEventListener(eventName,eventHandler,!1)}function removeNullEntries(array){var newArray=[];return array.forEach(function(item){item&&newArray.push(item)}),newArray}function isData(session){return!session.audio&&!session.video&&!session.screen&&session.data}function isNull(obj){return"undefined"==typeof obj}function isString(obj){return"string"==typeof obj}function isAudioPlusTab(connection,audioPlusTab){return(!connection.session.audio||"two-way"!==connection.session.audio)&&("Firefox"===DetectRTC.browser.name&&audioPlusTab!==!1||!("Chrome"!==DetectRTC.browser.name||DetectRTC.browser.version<50)&&(typeof audioPlusTab===!0||!("undefined"!=typeof audioPlusTab||!connection.session.audio||!connection.session.screen||connection.session.video)&&(audioPlusTab=!0,!0)))}function getTracks(stream,kind){return stream&&stream.getTracks?stream.getTracks().filter(function(t){return t.kind===(kind||"audio")}):[]}function isUnifiedPlanSupportedDefault(){var canAddTransceiver=!1;try{if("undefined"==typeof RTCRtpTransceiver)return!1;if(!("currentDirection"in RTCRtpTransceiver.prototype))return!1;var tempPc=new RTCPeerConnection;try{tempPc.addTransceiver("audio"),canAddTransceiver=!0}catch(e){}tempPc.close()}catch(e){canAddTransceiver=!1}return canAddTransceiver&&isUnifiedPlanSuppored()}function isUnifiedPlanSuppored(){var isUnifiedPlanSupported=!1;try{var pc=new RTCPeerConnection({sdpSemantics:"unified-plan"});try{var config=pc.getConfiguration();isUnifiedPlanSupported="unified-plan"==config.sdpSemantics||("plan-b"==config.sdpSemantics,!1)}catch(e){isUnifiedPlanSupported=!1}}catch(e){isUnifiedPlanSupported=!1}return isUnifiedPlanSupported}function setCordovaAPIs(){if("undefined"!=typeof cordova&&"undefined"!=typeof cordova.plugins&&"undefined"!=typeof cordova.plugins.iosrtc){var iosrtc=cordova.plugins.iosrtc;window.webkitRTCPeerConnection=iosrtc.RTCPeerConnection,window.RTCSessionDescription=iosrtc.RTCSessionDescription,window.RTCIceCandidate=iosrtc.RTCIceCandidate,window.MediaStream=iosrtc.MediaStream,window.MediaStreamTrack=iosrtc.MediaStreamTrack,navigator.getUserMedia=navigator.webkitGetUserMedia=iosrtc.getUserMedia,iosrtc.debug.enable("iosrtc*"),"function"==typeof iosrtc.selectAudioOutput&&iosrtc.selectAudioOutput(window.iOSDefaultAudioOutputDevice||"speaker"),iosrtc.registerGlobals()}}function setSdpConstraints(config){var sdpConstraints={OfferToReceiveAudio:!!config.OfferToReceiveAudio,OfferToReceiveVideo:!!config.OfferToReceiveVideo};return sdpConstraints}function PeerInitiator(config){function setChannelEvents(channel){channel.binaryType="arraybuffer",channel.onmessage=function(event){config.onDataChannelMessage(event.data)},channel.onopen=function(){config.onDataChannelOpened(channel)},channel.onerror=function(error){config.onDataChannelError(error)},channel.onclose=function(event){config.onDataChannelClosed(event)},channel.internalSend=channel.send,channel.send=function(data){"open"===channel.readyState&&channel.internalSend(data)},peer.channel=channel}function createOfferOrAnswer(_method){peer[_method](defaults.sdpConstraints).then(function(localSdp){"Safari"!==DetectRTC.browser.name&&(localSdp.sdp=connection.processSdp(localSdp.sdp)),peer.setLocalDescription(localSdp).then(function(){connection.trickleIce&&(config.onLocalSdp({type:localSdp.type,sdp:localSdp.sdp,remotePeerSdpConstraints:config.remotePeerSdpConstraints||!1,renegotiatingPeer:!!config.renegotiatingPeer||!1,connectionDescription:self.connectionDescription,dontGetRemoteStream:!!config.dontGetRemoteStream,extra:connection?connection.extra:{},streamsToShare:streamsToShare}),connection.onSettingLocalDescription(self))},function(error){connection.enableLogs&&console.error("setLocalDescription error",error)})},function(error){connection.enableLogs&&console.error("sdp-error",error)})}if("undefined"!=typeof window.RTCPeerConnection?RTCPeerConnection=window.RTCPeerConnection:"undefined"!=typeof mozRTCPeerConnection?RTCPeerConnection=mozRTCPeerConnection:"undefined"!=typeof webkitRTCPeerConnection&&(RTCPeerConnection=webkitRTCPeerConnection),RTCSessionDescription=window.RTCSessionDescription||window.mozRTCSessionDescription,RTCIceCandidate=window.RTCIceCandidate||window.mozRTCIceCandidate,MediaStreamTrack=window.MediaStreamTrack,!RTCPeerConnection)throw"WebRTC 1.0 (RTCPeerConnection) API are NOT available in this browser.";var connection=config.rtcMultiConnection;this.extra=config.remoteSdp?config.remoteSdp.extra:connection.extra,this.userid=config.userid,this.streams=[],this.channels=config.channels||[],this.connectionDescription=config.connectionDescription,this.addStream=function(session){connection.addStream(session,self.userid)},this.removeStream=function(streamid){connection.removeStream(streamid,self.userid)};var self=this;config.remoteSdp&&(this.connectionDescription=config.remoteSdp.connectionDescription);var allRemoteStreams={};defaults.sdpConstraints=setSdpConstraints({OfferToReceiveAudio:!0,OfferToReceiveVideo:!0});var peer,renegotiatingPeer=!!config.renegotiatingPeer;config.remoteSdp&&(renegotiatingPeer=!!config.remoteSdp.renegotiatingPeer);var localStreams=[];if(connection.attachStreams.forEach(function(stream){stream&&localStreams.push(stream)}),renegotiatingPeer)peer=config.peerRef;else{var iceTransports="all";(connection.candidates.turn||connection.candidates.relay)&&(connection.candidates.stun||connection.candidates.reflexive||connection.candidates.host||(iceTransports="relay"));try{var params={iceServers:connection.iceServers,iceTransportPolicy:connection.iceTransportPolicy||iceTransports};"undefined"!=typeof connection.iceCandidatePoolSize&&(params.iceCandidatePoolSize=connection.iceCandidatePoolSize),"undefined"!=typeof connection.bundlePolicy&&(params.bundlePolicy=connection.bundlePolicy),"undefined"!=typeof connection.rtcpMuxPolicy&&(params.rtcpMuxPolicy=connection.rtcpMuxPolicy),connection.sdpSemantics&&(params.sdpSemantics=connection.sdpSemantics||"unified-plan"),connection.iceServers&&connection.iceServers.length||(params=null,connection.optionalArgument=null),peer=new RTCPeerConnection(params,connection.optionalArgument)}catch(e){try{var params={iceServers:connection.iceServers};peer=new RTCPeerConnection(params)}catch(e){peer=new RTCPeerConnection}}}!peer.getRemoteStreams&&peer.getReceivers&&(peer.getRemoteStreams=function(){var stream=new MediaStream;return peer.getReceivers().forEach(function(receiver){stream.addTrack(receiver.track)}),[stream]}),!peer.getLocalStreams&&peer.getSenders&&(peer.getLocalStreams=function(){var stream=new MediaStream;return peer.getSenders().forEach(function(sender){stream.addTrack(sender.track)}),[stream]}),peer.onicecandidate=function(event){if(event.candidate)connection.trickleIce&&config.onLocalCandidate({candidate:event.candidate.candidate,sdpMid:event.candidate.sdpMid,sdpMLineIndex:event.candidate.sdpMLineIndex});else if(!connection.trickleIce){var localSdp=peer.localDescription;config.onLocalSdp({type:localSdp.type,sdp:localSdp.sdp,remotePeerSdpConstraints:config.remotePeerSdpConstraints||!1,renegotiatingPeer:!!config.renegotiatingPeer||!1,connectionDescription:self.connectionDescription,dontGetRemoteStream:!!config.dontGetRemoteStream,extra:connection?connection.extra:{},streamsToShare:streamsToShare})}},localStreams.forEach(function(localStream){config.remoteSdp&&config.remoteSdp.remotePeerSdpConstraints&&config.remoteSdp.remotePeerSdpConstraints.dontGetRemoteStream||config.dontAttachLocalStream||(localStream=connection.beforeAddingStream(localStream,self),localStream&&(peer.getLocalStreams().forEach(function(stream){localStream&&stream.id==localStream.id&&(localStream=null)}),localStream&&localStream.getTracks&&localStream.getTracks().forEach(function(track){try{peer.addTrack(track,localStream)}catch(e){}})))}),peer.oniceconnectionstatechange=peer.onsignalingstatechange=function(){var extra=self.extra;connection.peers[self.userid]&&(extra=connection.peers[self.userid].extra||extra),peer&&(config.onPeerStateChanged({iceConnectionState:peer.iceConnectionState,iceGatheringState:peer.iceGatheringState,signalingState:peer.signalingState,extra:extra,userid:self.userid}),peer&&peer.iceConnectionState&&peer.iceConnectionState.search(/closed|failed/gi)!==-1&&self.streams instanceof Array&&self.streams.forEach(function(stream){var streamEvent=connection.streamEvents[stream.id]||{streamid:stream.id,stream:stream,type:"remote"};connection.onstreamended(streamEvent)}))};var sdpConstraints={OfferToReceiveAudio:!!localStreams.length,OfferToReceiveVideo:!!localStreams.length};config.localPeerSdpConstraints&&(sdpConstraints=config.localPeerSdpConstraints),defaults.sdpConstraints=setSdpConstraints(sdpConstraints);var dontDuplicate={};peer.ontrack=function(event){if(event&&"track"===event.type){if(event.stream=event.streams[event.streams.length-1],event.stream.id||(event.stream.id=event.track.id),dontDuplicate[event.stream.id]&&"Safari"!==DetectRTC.browser.name)return void(event.track&&(event.track.onended=function(){peer&&peer.onremovestream(event)}));dontDuplicate[event.stream.id]=event.stream.id;var streamsToShare={};config.remoteSdp&&config.remoteSdp.streamsToShare?streamsToShare=config.remoteSdp.streamsToShare:config.streamsToShare&&(streamsToShare=config.streamsToShare);
+"use strict";var RTCMultiConnection=function(roomid,forceOptions){function SocketConnection(connection,connectCallback){function isData(session){return!session.audio&&!session.video&&!session.screen&&session.data}function updateExtraBackup(remoteUserId,extra){connection.peersBackup[remoteUserId]||(connection.peersBackup[remoteUserId]={userid:remoteUserId,extra:{}}),connection.peersBackup[remoteUserId].extra=extra}function onMessageEvent(message){if(message.remoteUserId==connection.userid){if(connection.peers[message.sender]&&connection.peers[message.sender].extra!=message.message.extra&&(connection.peers[message.sender].extra=message.extra,connection.onExtraDataUpdated({userid:message.sender,extra:message.extra}),updateExtraBackup(message.sender,message.extra)),message.message.streamSyncNeeded&&connection.peers[message.sender]){var stream=connection.streamEvents[message.message.streamid];if(!stream||!stream.stream)return;var action=message.message.action;if("ended"===action||"inactive"===action||"stream-removed"===action)return connection.peersBackup[stream.userid]&&(stream.extra=connection.peersBackup[stream.userid].extra),void connection.onstreamended(stream);var type="both"!=message.message.type?message.message.type:null;return void("function"==typeof stream.stream[action]&&stream.stream[action](type))}if("dropPeerConnection"===message.message)return void connection.deletePeer(message.sender);if(message.message.allParticipants)return message.message.allParticipants.indexOf(message.sender)===-1&&message.message.allParticipants.push(message.sender),void message.message.allParticipants.forEach(function(participant){mPeer[connection.peers[participant]?"renegotiatePeer":"createNewPeer"](participant,{localPeerSdpConstraints:{OfferToReceiveAudio:connection.sdpConstraints.mandatory.OfferToReceiveAudio,OfferToReceiveVideo:connection.sdpConstraints.mandatory.OfferToReceiveVideo},remotePeerSdpConstraints:{OfferToReceiveAudio:connection.session.oneway?!!connection.session.audio:connection.sdpConstraints.mandatory.OfferToReceiveAudio,OfferToReceiveVideo:connection.session.oneway?!!connection.session.video||!!connection.session.screen:connection.sdpConstraints.mandatory.OfferToReceiveVideo},isOneWay:!!connection.session.oneway||"one-way"===connection.direction,isDataOnly:isData(connection.session)})});if(message.message.newParticipant){if(message.message.newParticipant==connection.userid)return;if(connection.peers[message.message.newParticipant])return;return void mPeer.createNewPeer(message.message.newParticipant,message.message.userPreferences||{localPeerSdpConstraints:{OfferToReceiveAudio:connection.sdpConstraints.mandatory.OfferToReceiveAudio,OfferToReceiveVideo:connection.sdpConstraints.mandatory.OfferToReceiveVideo},remotePeerSdpConstraints:{OfferToReceiveAudio:connection.session.oneway?!!connection.session.audio:connection.sdpConstraints.mandatory.OfferToReceiveAudio,OfferToReceiveVideo:connection.session.oneway?!!connection.session.video||!!connection.session.screen:connection.sdpConstraints.mandatory.OfferToReceiveVideo},isOneWay:!!connection.session.oneway||"one-way"===connection.direction,isDataOnly:isData(connection.session)})}if(message.message.readyForOffer&&(connection.attachStreams.length&&(connection.waitingForLocalMedia=!1),connection.waitingForLocalMedia))return void setTimeout(function(){onMessageEvent(message)},1);if(message.message.newParticipationRequest&&message.sender!==connection.userid){connection.peers[message.sender]&&connection.deletePeer(message.sender);var userPreferences={extra:message.extra||{},localPeerSdpConstraints:message.message.remotePeerSdpConstraints||{OfferToReceiveAudio:connection.sdpConstraints.mandatory.OfferToReceiveAudio,OfferToReceiveVideo:connection.sdpConstraints.mandatory.OfferToReceiveVideo},remotePeerSdpConstraints:message.message.localPeerSdpConstraints||{OfferToReceiveAudio:connection.session.oneway?!!connection.session.audio:connection.sdpConstraints.mandatory.OfferToReceiveAudio,OfferToReceiveVideo:connection.session.oneway?!!connection.session.video||!!connection.session.screen:connection.sdpConstraints.mandatory.OfferToReceiveVideo},isOneWay:"undefined"!=typeof message.message.isOneWay?message.message.isOneWay:!!connection.session.oneway||"one-way"===connection.direction,isDataOnly:"undefined"!=typeof message.message.isDataOnly?message.message.isDataOnly:isData(connection.session),dontGetRemoteStream:"undefined"!=typeof message.message.isOneWay?message.message.isOneWay:!!connection.session.oneway||"one-way"===connection.direction,dontAttachLocalStream:!!message.message.dontGetRemoteStream,connectionDescription:message,successCallback:function(){}};return void connection.onNewParticipant(message.sender,userPreferences)}return message.message.changedUUID&&connection.peers[message.message.oldUUID]&&(connection.peers[message.message.newUUID]=connection.peers[message.message.oldUUID],delete connection.peers[message.message.oldUUID]),message.message.userLeft?(mPeer.onUserLeft(message.sender),void(message.message.autoCloseEntireSession&&connection.leave())):void mPeer.addNegotiatedMessage(message.message,message.sender)}}var parameters="";parameters+="?userid="+connection.userid,parameters+="&sessionid="+connection.sessionid,parameters+="&msgEvent="+connection.socketMessageEvent,parameters+="&socketCustomEvent="+connection.socketCustomEvent,parameters+="&autoCloseEntireSession="+!!connection.autoCloseEntireSession,connection.session.broadcast===!0&&(parameters+="&oneToMany=true"),parameters+="&maxParticipantsAllowed="+connection.maxParticipantsAllowed,connection.enableScalableBroadcast&&(parameters+="&enableScalableBroadcast=true",parameters+="&maxRelayLimitPerUser="+(connection.maxRelayLimitPerUser||2)),parameters+="&extra="+JSON.stringify(connection.extra||{}),connection.socketCustomParameters&&(parameters+=connection.socketCustomParameters);try{io.sockets={}}catch(e){}if(connection.socketURL||(connection.socketURL="/"),"/"!=connection.socketURL.substr(connection.socketURL.length-1,1))throw'"socketURL" MUST end with a slash.';connection.enableLogs&&("/"==connection.socketURL?console.info("socket.io url is: ",location.origin+"/"):console.info("socket.io url is: ",connection.socketURL));try{connection.socket=io(connection.socketURL+parameters)}catch(e){connection.socket=io.connect(connection.socketURL+parameters,connection.socketOptions)}var mPeer=connection.multiPeersHandler;connection.socket.on("extra-data-updated",function(remoteUserId,extra){connection.peers[remoteUserId]&&(connection.peers[remoteUserId].extra=extra,connection.onExtraDataUpdated({userid:remoteUserId,extra:extra}),updateExtraBackup(remoteUserId,extra))}),connection.socket.on(connection.socketMessageEvent,onMessageEvent);var alreadyConnected=!1;connection.socket.resetProps=function(){alreadyConnected=!1},connection.socket.on("connect",function(){alreadyConnected||(alreadyConnected=!0,connection.enableLogs&&console.info("socket.io connection is opened."),setTimeout(function(){connection.socket.emit("extra-data-updated",connection.extra)},1e3),connectCallback&&connectCallback(connection.socket))}),connection.socket.on("disconnect",function(event){connection.onSocketDisconnect(event)}),connection.socket.on("error",function(event){connection.onSocketError(event)}),connection.socket.on("user-disconnected",function(remoteUserId){remoteUserId!==connection.userid&&(connection.onUserStatusChanged({userid:remoteUserId,status:"offline",extra:connection.peers[remoteUserId]?connection.peers[remoteUserId].extra||{}:{}}),connection.deletePeer(remoteUserId))}),connection.socket.on("user-connected",function(userid){userid!==connection.userid&&connection.onUserStatusChanged({userid:userid,status:"online",extra:connection.peers[userid]?connection.peers[userid].extra||{}:{}})}),connection.socket.on("closed-entire-session",function(sessionid,extra){connection.leave(),connection.onEntireSessionClosed({sessionid:sessionid,userid:sessionid,extra:extra})}),connection.socket.on("userid-already-taken",function(useridAlreadyTaken,yourNewUserId){connection.onUserIdAlreadyTaken(useridAlreadyTaken,yourNewUserId)}),connection.socket.on("logs",function(log){connection.enableLogs&&console.debug("server-logs",log)}),connection.socket.on("number-of-broadcast-viewers-updated",function(data){connection.onNumberOfBroadcastViewersUpdated(data)}),connection.socket.on("set-isInitiator-true",function(sessionid){sessionid==connection.sessionid&&(connection.isInitiator=!0)})}function MultiPeers(connection){function initFileBufferReader(){connection.fbr=new FileBufferReader,connection.fbr.onProgress=function(chunk){connection.onFileProgress(chunk)},connection.fbr.onBegin=function(file){connection.onFileStart(file)},connection.fbr.onEnd=function(file){connection.onFileEnd(file)}}var self=this,skipPeers=["getAllParticipants","getLength","selectFirst","streams","send","forEach"];connection.peers={getLength:function(){var numberOfPeers=0;for(var peer in this)skipPeers.indexOf(peer)==-1&&numberOfPeers++;return numberOfPeers},selectFirst:function(){var firstPeer;for(var peer in this)skipPeers.indexOf(peer)==-1&&(firstPeer=this[peer]);return firstPeer},getAllParticipants:function(sender){var allPeers=[];for(var peer in this)skipPeers.indexOf(peer)==-1&&peer!=sender&&allPeers.push(peer);return allPeers},forEach:function(callbcak){this.getAllParticipants().forEach(function(participant){callbcak(connection.peers[participant])})},send:function(data,remoteUserId){var that=this;if(!isNull(data.size)&&!isNull(data.type)){if(connection.enableFileSharing)return void self.shareFile(data,remoteUserId);"string"!=typeof data&&(data=JSON.stringify(data))}if(!("text"===data.type||data instanceof ArrayBuffer||data instanceof DataView))return void TextSender.send({text:data,channel:this,connection:connection,remoteUserId:remoteUserId});if("text"===data.type&&(data=JSON.stringify(data)),remoteUserId){var remoteUser=connection.peers[remoteUserId];if(remoteUser)return remoteUser.channels.length?void remoteUser.channels.forEach(function(channel){channel.send(data)}):(connection.peers[remoteUserId].createDataChannel(),connection.renegotiate(remoteUserId),void setTimeout(function(){that.send(data,remoteUserId)},3e3))}this.getAllParticipants().forEach(function(participant){return that[participant].channels.length?void that[participant].channels.forEach(function(channel){channel.send(data)}):(connection.peers[participant].createDataChannel(),connection.renegotiate(participant),void setTimeout(function(){that[participant].channels.forEach(function(channel){channel.send(data)})},3e3))})}},this.uuid=connection.userid,this.getLocalConfig=function(remoteSdp,remoteUserId,userPreferences){return userPreferences||(userPreferences={}),{streamsToShare:userPreferences.streamsToShare||{},rtcMultiConnection:connection,connectionDescription:userPreferences.connectionDescription,userid:remoteUserId,localPeerSdpConstraints:userPreferences.localPeerSdpConstraints,remotePeerSdpConstraints:userPreferences.remotePeerSdpConstraints,dontGetRemoteStream:!!userPreferences.dontGetRemoteStream,dontAttachLocalStream:!!userPreferences.dontAttachLocalStream,renegotiatingPeer:!!userPreferences.renegotiatingPeer,peerRef:userPreferences.peerRef,channels:userPreferences.channels||[],onLocalSdp:function(localSdp){self.onNegotiationNeeded(localSdp,remoteUserId)},onLocalCandidate:function(localCandidate){localCandidate=OnIceCandidateHandler.processCandidates(connection,localCandidate),localCandidate&&self.onNegotiationNeeded(localCandidate,remoteUserId)},remoteSdp:remoteSdp,onDataChannelMessage:function(message){if(!connection.fbr&&connection.enableFileSharing&&initFileBufferReader(),"string"==typeof message||!connection.enableFileSharing)return void self.onDataChannelMessage(message,remoteUserId);var that=this;return message instanceof ArrayBuffer||message instanceof DataView?void connection.fbr.convertToObject(message,function(object){that.onDataChannelMessage(object)}):message.readyForNextChunk?void connection.fbr.getNextChunk(message,function(nextChunk,isLastChunk){connection.peers[remoteUserId].channels.forEach(function(channel){channel.send(nextChunk)})},remoteUserId):message.chunkMissing?void connection.fbr.chunkMissing(message):void connection.fbr.addChunk(message,function(promptNextChunk){connection.peers[remoteUserId].peer.channel.send(promptNextChunk)})},onDataChannelError:function(error){self.onDataChannelError(error,remoteUserId)},onDataChannelOpened:function(channel){self.onDataChannelOpened(channel,remoteUserId)},onDataChannelClosed:function(event){self.onDataChannelClosed(event,remoteUserId)},onRemoteStream:function(stream){connection.peers[remoteUserId]&&connection.peers[remoteUserId].streams.push(stream),self.onGettingRemoteMedia(stream,remoteUserId)},onRemoteStreamRemoved:function(stream){self.onRemovingRemoteMedia(stream,remoteUserId)},onPeerStateChanged:function(states){self.onPeerStateChanged(states),"new"===states.iceConnectionState&&self.onNegotiationStarted(remoteUserId,states),"connected"===states.iceConnectionState&&self.onNegotiationCompleted(remoteUserId,states),states.iceConnectionState.search(/closed|failed/gi)!==-1&&(self.onUserLeft(remoteUserId),self.disconnectWith(remoteUserId))}}},this.createNewPeer=function(remoteUserId,userPreferences){if(!(connection.maxParticipantsAllowed<=connection.getAllParticipants().length)){if(userPreferences=userPreferences||{},connection.isInitiator&&connection.session.audio&&"two-way"===connection.session.audio&&!userPreferences.streamsToShare&&(userPreferences.isOneWay=!1,userPreferences.isDataOnly=!1,userPreferences.session=connection.session),!userPreferences.isOneWay&&!userPreferences.isDataOnly)return userPreferences.isOneWay=!0,void this.onNegotiationNeeded({enableMedia:!0,userPreferences:userPreferences},remoteUserId);userPreferences=connection.setUserPreferences(userPreferences,remoteUserId);var localConfig=this.getLocalConfig(null,remoteUserId,userPreferences);connection.peers[remoteUserId]=new PeerInitiator(localConfig)}},this.createAnsweringPeer=function(remoteSdp,remoteUserId,userPreferences){userPreferences=connection.setUserPreferences(userPreferences||{},remoteUserId);var localConfig=this.getLocalConfig(remoteSdp,remoteUserId,userPreferences);connection.peers[remoteUserId]=new PeerInitiator(localConfig)},this.renegotiatePeer=function(remoteUserId,userPreferences,remoteSdp){if(!connection.peers[remoteUserId])return void(connection.enableLogs&&console.error("Peer ("+remoteUserId+") does not exist. Renegotiation skipped."));userPreferences||(userPreferences={}),userPreferences.renegotiatingPeer=!0,userPreferences.peerRef=connection.peers[remoteUserId].peer,userPreferences.channels=connection.peers[remoteUserId].channels;var localConfig=this.getLocalConfig(remoteSdp,remoteUserId,userPreferences);connection.peers[remoteUserId]=new PeerInitiator(localConfig)},this.replaceTrack=function(track,remoteUserId,isVideoTrack){if(!connection.peers[remoteUserId])throw"This peer ("+remoteUserId+") does not exist.";var peer=connection.peers[remoteUserId].peer;return peer.getSenders&&"function"==typeof peer.getSenders&&peer.getSenders().length?void peer.getSenders().forEach(function(rtpSender){isVideoTrack&&"video"===rtpSender.track.kind&&(connection.peers[remoteUserId].peer.lastVideoTrack=rtpSender.track,rtpSender.replaceTrack(track)),isVideoTrack||"audio"!==rtpSender.track.kind||(connection.peers[remoteUserId].peer.lastAudioTrack=rtpSender.track,rtpSender.replaceTrack(track))}):(console.warn("RTPSender.replaceTrack is NOT supported."),void this.renegotiatePeer(remoteUserId))},this.onNegotiationNeeded=function(message,remoteUserId){},this.addNegotiatedMessage=function(message,remoteUserId){if(message.type&&message.sdp)return"answer"==message.type&&connection.peers[remoteUserId]&&connection.peers[remoteUserId].addRemoteSdp(message),"offer"==message.type&&(message.renegotiatingPeer?this.renegotiatePeer(remoteUserId,null,message):this.createAnsweringPeer(message,remoteUserId)),void(connection.enableLogs&&console.log("Remote peer's sdp:",message.sdp));if(message.candidate)return connection.peers[remoteUserId]&&connection.peers[remoteUserId].addRemoteCandidate(message),void(connection.enableLogs&&console.log("Remote peer's candidate pairs:",message.candidate));if(message.enableMedia){connection.session=message.userPreferences.session||connection.session,connection.session.oneway&&connection.attachStreams.length&&(connection.attachStreams=[]),message.userPreferences.isDataOnly&&connection.attachStreams.length&&(connection.attachStreams.length=[]);var streamsToShare={};connection.attachStreams.forEach(function(stream){streamsToShare[stream.streamid]={isAudio:!!stream.isAudio,isVideo:!!stream.isVideo,isScreen:!!stream.isScreen}}),message.userPreferences.streamsToShare=streamsToShare,self.onNegotiationNeeded({readyForOffer:!0,userPreferences:message.userPreferences},remoteUserId)}message.readyForOffer&&connection.onReadyForOffer(remoteUserId,message.userPreferences)},this.onGettingRemoteMedia=function(stream,remoteUserId){},this.onRemovingRemoteMedia=function(stream,remoteUserId){},this.onGettingLocalMedia=function(localStream){},this.onLocalMediaError=function(error,constraints){connection.onMediaError(error,constraints)},this.shareFile=function(file,remoteUserId){initFileBufferReader(),connection.fbr.readAsArrayBuffer(file,function(uuid){var arrayOfUsers=connection.getAllParticipants();remoteUserId&&(arrayOfUsers=[remoteUserId]),arrayOfUsers.forEach(function(participant){connection.fbr.getNextChunk(uuid,function(nextChunk){connection.peers[participant].channels.forEach(function(channel){channel.send(nextChunk)})},participant)})},{userid:connection.userid,chunkSize:"Firefox"===DetectRTC.browser.name?15e3:connection.chunkSize||0})};var textReceiver=new TextReceiver(connection);this.onDataChannelMessage=function(message,remoteUserId){textReceiver.receive(JSON.parse(message),remoteUserId,connection.peers[remoteUserId]?connection.peers[remoteUserId].extra:{})},this.onDataChannelClosed=function(event,remoteUserId){event.userid=remoteUserId,event.extra=connection.peers[remoteUserId]?connection.peers[remoteUserId].extra:{},connection.onclose(event)},this.onDataChannelError=function(error,remoteUserId){error.userid=remoteUserId,event.extra=connection.peers[remoteUserId]?connection.peers[remoteUserId].extra:{},connection.onerror(error)},this.onDataChannelOpened=function(channel,remoteUserId){return connection.peers[remoteUserId].channels.length?void(connection.peers[remoteUserId].channels=[channel]):(connection.peers[remoteUserId].channels.push(channel),void connection.onopen({userid:remoteUserId,extra:connection.peers[remoteUserId]?connection.peers[remoteUserId].extra:{},channel:channel}))},this.onPeerStateChanged=function(state){connection.onPeerStateChanged(state)},this.onNegotiationStarted=function(remoteUserId,states){},this.onNegotiationCompleted=function(remoteUserId,states){},this.getRemoteStreams=function(remoteUserId){return remoteUserId=remoteUserId||connection.peers.getAllParticipants()[0],connection.peers[remoteUserId]?connection.peers[remoteUserId].streams:[]}}function fireEvent(obj,eventName,args){if("undefined"!=typeof CustomEvent){var eventDetail={arguments:args,__exposedProps__:args},event=new CustomEvent(eventName,eventDetail);obj.dispatchEvent(event)}}function setHarkEvents(connection,streamEvent){if(streamEvent.stream&&getTracks(streamEvent.stream,"audio").length){if(!connection||!streamEvent)throw"Both arguments are required.";if(connection.onspeaking&&connection.onsilence){if("undefined"==typeof hark)throw"hark.js not found.";hark(streamEvent.stream,{onspeaking:function(){connection.onspeaking(streamEvent)},onsilence:function(){connection.onsilence(streamEvent)},onvolumechange:function(volume,threshold){connection.onvolumechange&&connection.onvolumechange(merge({volume:volume,threshold:threshold},streamEvent))}})}}}function setMuteHandlers(connection,streamEvent){streamEvent.stream&&streamEvent.stream&&streamEvent.stream.addEventListener&&(streamEvent.stream.addEventListener("mute",function(event){event=connection.streamEvents[streamEvent.streamid],event.session={audio:"audio"===event.muteType,video:"video"===event.muteType},connection.onmute(event)},!1),streamEvent.stream.addEventListener("unmute",function(event){event=connection.streamEvents[streamEvent.streamid],event.session={audio:"audio"===event.unmuteType,video:"video"===event.unmuteType},connection.onunmute(event)},!1))}function getRandomString(){if(window.crypto&&window.crypto.getRandomValues&&navigator.userAgent.indexOf("Safari")===-1){for(var a=window.crypto.getRandomValues(new Uint32Array(3)),token="",i=0,l=a.length;i<l;i++)token+=a[i].toString(36);return token}return(Math.random()*(new Date).getTime()).toString(36).replace(/\./g,"")}function getRMCMediaElement(stream,callback,connection){if(!connection.autoCreateMediaElement)return void callback({});var isAudioOnly=!1;getTracks(stream,"video").length||stream.isVideo||stream.isScreen||(isAudioOnly=!0),"Firefox"===DetectRTC.browser.name&&(connection.session.video||connection.session.screen)&&(isAudioOnly=!1);var mediaElement=document.createElement(isAudioOnly?"audio":"video");if(mediaElement.srcObject=stream,mediaElement.setAttribute("autoplay",!0),mediaElement.setAttribute("playsinline",!0),mediaElement.setAttribute("controls",!0),mediaElement.setAttribute("muted",!1),mediaElement.setAttribute("volume",1),"Firefox"===DetectRTC.browser.name){var streamEndedEvent="ended";"oninactive"in mediaElement&&(streamEndedEvent="inactive"),mediaElement.addEventListener(streamEndedEvent,function(){if(currentUserMediaRequest.remove(stream.idInstance),"local"===stream.type){streamEndedEvent="ended","oninactive"in stream&&(streamEndedEvent="inactive"),StreamsHandler.onSyncNeeded(stream.streamid,streamEndedEvent),connection.attachStreams.forEach(function(aStream,idx){stream.streamid===aStream.streamid&&delete connection.attachStreams[idx]});var newStreamsArray=[];connection.attachStreams.forEach(function(aStream){aStream&&newStreamsArray.push(aStream)}),connection.attachStreams=newStreamsArray;var streamEvent=connection.streamEvents[stream.streamid];if(streamEvent)return void connection.onstreamended(streamEvent);this.parentNode&&this.parentNode.removeChild(this)}},!1)}var played=mediaElement.play();if("undefined"!=typeof played){var cbFired=!1;setTimeout(function(){cbFired||(cbFired=!0,callback(mediaElement))},1e3),played.then(function(){cbFired||(cbFired=!0,callback(mediaElement))})["catch"](function(error){cbFired||(cbFired=!0,callback(mediaElement))})}else callback(mediaElement)}function listenEventHandler(eventName,eventHandler){window.removeEventListener(eventName,eventHandler),window.addEventListener(eventName,eventHandler,!1)}function removeNullEntries(array){var newArray=[];return array.forEach(function(item){item&&newArray.push(item)}),newArray}function isData(session){return!session.audio&&!session.video&&!session.screen&&session.data}function isNull(obj){return"undefined"==typeof obj}function isString(obj){return"string"==typeof obj}function isAudioPlusTab(connection,audioPlusTab){return(!connection.session.audio||"two-way"!==connection.session.audio)&&("Firefox"===DetectRTC.browser.name&&audioPlusTab!==!1||!("Chrome"!==DetectRTC.browser.name||DetectRTC.browser.version<50)&&(typeof audioPlusTab===!0||!("undefined"!=typeof audioPlusTab||!connection.session.audio||!connection.session.screen||connection.session.video)&&(audioPlusTab=!0,!0)))}function getTracks(stream,kind){return stream&&stream.getTracks?stream.getTracks().filter(function(t){return t.kind===(kind||"audio")}):[]}function isUnifiedPlanSupportedDefault(){var canAddTransceiver=!1;try{if("undefined"==typeof RTCRtpTransceiver)return!1;if(!("currentDirection"in RTCRtpTransceiver.prototype))return!1;var tempPc=new RTCPeerConnection;try{tempPc.addTransceiver("audio"),canAddTransceiver=!0}catch(e){}tempPc.close()}catch(e){canAddTransceiver=!1}return canAddTransceiver&&isUnifiedPlanSuppored()}function isUnifiedPlanSuppored(){var isUnifiedPlanSupported=!1;try{var pc=new RTCPeerConnection({sdpSemantics:"unified-plan"});try{var config=pc.getConfiguration();isUnifiedPlanSupported="unified-plan"==config.sdpSemantics||("plan-b"==config.sdpSemantics,!1)}catch(e){isUnifiedPlanSupported=!1}}catch(e){isUnifiedPlanSupported=!1}return isUnifiedPlanSupported}function setCordovaAPIs(){if("undefined"!=typeof cordova&&"undefined"!=typeof cordova.plugins&&"undefined"!=typeof cordova.plugins.iosrtc){var iosrtc=cordova.plugins.iosrtc;window.webkitRTCPeerConnection=iosrtc.RTCPeerConnection,window.RTCSessionDescription=iosrtc.RTCSessionDescription,window.RTCIceCandidate=iosrtc.RTCIceCandidate,window.MediaStream=iosrtc.MediaStream,window.MediaStreamTrack=iosrtc.MediaStreamTrack,navigator.getUserMedia=navigator.webkitGetUserMedia=iosrtc.getUserMedia,iosrtc.debug.enable("iosrtc*"),"function"==typeof iosrtc.selectAudioOutput&&iosrtc.selectAudioOutput(window.iOSDefaultAudioOutputDevice||"speaker"),iosrtc.registerGlobals()}}function setSdpConstraints(config){var sdpConstraints={OfferToReceiveAudio:!!config.OfferToReceiveAudio,OfferToReceiveVideo:!!config.OfferToReceiveVideo};return sdpConstraints}function PeerInitiator(config){function setChannelEvents(channel){channel.binaryType="arraybuffer",channel.onmessage=function(event){config.onDataChannelMessage(event.data)},channel.onopen=function(){config.onDataChannelOpened(channel)},channel.onerror=function(error){config.onDataChannelError(error)},channel.onclose=function(event){config.onDataChannelClosed(event)},channel.internalSend=channel.send,channel.send=function(data){"open"===channel.readyState&&channel.internalSend(data)},peer.channel=channel}function createOfferOrAnswer(_method){peer[_method](defaults.sdpConstraints).then(function(localSdp){"Safari"!==DetectRTC.browser.name&&(localSdp.sdp=connection.processSdp(localSdp.sdp)),peer.setLocalDescription(localSdp).then(function(){connection.trickleIce&&(config.onLocalSdp({type:localSdp.type,sdp:localSdp.sdp,remotePeerSdpConstraints:config.remotePeerSdpConstraints||!1,renegotiatingPeer:!!config.renegotiatingPeer||!1,connectionDescription:self.connectionDescription,dontGetRemoteStream:!!config.dontGetRemoteStream,extra:connection?connection.extra:{},streamsToShare:streamsToShare}),connection.onSettingLocalDescription(self))},function(error){connection.enableLogs&&console.error("setLocalDescription error",error)})},function(error){connection.enableLogs&&console.error("sdp-error",error)})}if("undefined"!=typeof window.RTCPeerConnection?RTCPeerConnection=window.RTCPeerConnection:"undefined"!=typeof mozRTCPeerConnection?RTCPeerConnection=mozRTCPeerConnection:"undefined"!=typeof webkitRTCPeerConnection&&(RTCPeerConnection=webkitRTCPeerConnection),RTCSessionDescription=window.RTCSessionDescription||window.mozRTCSessionDescription,RTCIceCandidate=window.RTCIceCandidate||window.mozRTCIceCandidate,MediaStreamTrack=window.MediaStreamTrack,!RTCPeerConnection)throw"WebRTC 1.0 (RTCPeerConnection) API are NOT available in this browser.";var connection=config.rtcMultiConnection;this.extra=config.remoteSdp?config.remoteSdp.extra:connection.extra,this.userid=config.userid,this.streams=[],this.channels=config.channels||[],this.connectionDescription=config.connectionDescription,this.addStream=function(session){connection.addStream(session,self.userid)},this.removeStream=function(streamid){connection.removeStream(streamid,self.userid)};var self=this;config.remoteSdp&&(this.connectionDescription=config.remoteSdp.connectionDescription);var allRemoteStreams={};defaults.sdpConstraints=setSdpConstraints({OfferToReceiveAudio:!0,OfferToReceiveVideo:!0});var peer,renegotiatingPeer=!!config.renegotiatingPeer;config.remoteSdp&&(renegotiatingPeer=!!config.remoteSdp.renegotiatingPeer);var localStreams=[];if(connection.attachStreams.forEach(function(stream){stream&&localStreams.push(stream)}),renegotiatingPeer)peer=config.peerRef;else{var iceTransports="all";(connection.candidates.turn||connection.candidates.relay)&&(connection.candidates.stun||connection.candidates.reflexive||connection.candidates.host||(iceTransports="relay"));try{var params={iceServers:connection.iceServers,iceTransportPolicy:connection.iceTransportPolicy||iceTransports};"undefined"!=typeof connection.iceCandidatePoolSize&&(params.iceCandidatePoolSize=connection.iceCandidatePoolSize),"undefined"!=typeof connection.bundlePolicy&&(params.bundlePolicy=connection.bundlePolicy),"undefined"!=typeof connection.rtcpMuxPolicy&&(params.rtcpMuxPolicy=connection.rtcpMuxPolicy),connection.sdpSemantics&&(params.sdpSemantics=connection.sdpSemantics||"unified-plan"),connection.iceServers&&connection.iceServers.length||(params=null,connection.optionalArgument=null),peer=new RTCPeerConnection(params,connection.optionalArgument)}catch(e){try{var params={iceServers:connection.iceServers};peer=new RTCPeerConnection(params)}catch(e){peer=new RTCPeerConnection}}}!peer.getRemoteStreams&&peer.getReceivers&&(peer.getRemoteStreams=function(){var stream=new MediaStream;return peer.getReceivers().forEach(function(receiver){stream.addTrack(receiver.track)}),[stream]}),!peer.getLocalStreams&&peer.getSenders&&(peer.getLocalStreams=function(){var stream=new MediaStream;return peer.getSenders().forEach(function(sender){stream.addTrack(sender.track)}),[stream]}),peer.onicecandidate=function(event){if(event.candidate)connection.trickleIce&&config.onLocalCandidate({candidate:event.candidate.candidate,sdpMid:event.candidate.sdpMid,sdpMLineIndex:event.candidate.sdpMLineIndex});else if(!connection.trickleIce){var localSdp=peer.localDescription;config.onLocalSdp({type:localSdp.type,sdp:localSdp.sdp,remotePeerSdpConstraints:config.remotePeerSdpConstraints||!1,renegotiatingPeer:!!config.renegotiatingPeer||!1,connectionDescription:self.connectionDescription,dontGetRemoteStream:!!config.dontGetRemoteStream,extra:connection?connection.extra:{},streamsToShare:streamsToShare})}},localStreams.forEach(function(localStream){config.remoteSdp&&config.remoteSdp.remotePeerSdpConstraints&&config.remoteSdp.remotePeerSdpConstraints.dontGetRemoteStream||config.dontAttachLocalStream||(localStream=connection.beforeAddingStream(localStream,self),localStream&&(peer.getLocalStreams().forEach(function(stream){localStream&&stream.id==localStream.id&&(localStream=null)}),localStream&&localStream.getTracks&&localStream.getTracks().forEach(function(track){try{peer.addTrack(track,localStream)}catch(e){}})))}),peer.oniceconnectionstatechange=peer.onsignalingstatechange=function(){var extra=self.extra;connection.peers[self.userid]&&(extra=connection.peers[self.userid].extra||extra),peer&&(config.onPeerStateChanged({iceConnectionState:peer.iceConnectionState,iceGatheringState:peer.iceGatheringState,signalingState:peer.signalingState,extra:extra,userid:self.userid}),peer&&peer.iceConnectionState&&peer.iceConnectionState.search(/closed|failed/gi)!==-1&&self.streams instanceof Array&&self.streams.forEach(function(stream){var streamEvent=connection.streamEvents[stream.id]||{streamid:stream.id,stream:stream,type:"remote"};connection.onstreamended(streamEvent)}))};var sdpConstraints={OfferToReceiveAudio:!!localStreams.length,OfferToReceiveVideo:!!localStreams.length};config.localPeerSdpConstraints&&(sdpConstraints=config.localPeerSdpConstraints),defaults.sdpConstraints=setSdpConstraints(sdpConstraints);var dontDuplicate={};peer.ontrack=function(event){if(event&&"track"===event.type){if(event.stream=event.streams[event.streams.length-1],event.stream.id||(event.stream.id=event.track.id),dontDuplicate[event.stream.id]&&"Safari"!==DetectRTC.browser.name)return void(event.track&&(event.track.onended=function(){peer&&peer.onremovestream(event)}));dontDuplicate[event.stream.id]=event.stream.id;var streamsToShare={};config.remoteSdp&&config.remoteSdp.streamsToShare?streamsToShare=config.remoteSdp.streamsToShare:config.streamsToShare&&(streamsToShare=config.streamsToShare);
 var streamToShare=streamsToShare[event.stream.id];streamToShare?(event.stream.isAudio=streamToShare.isAudio,event.stream.isVideo=streamToShare.isVideo,event.stream.isScreen=streamToShare.isScreen):(event.stream.isVideo=!!getTracks(event.stream,"video").length,event.stream.isAudio=!event.stream.isVideo,event.stream.isScreen=!1),event.stream.streamid=event.stream.id,allRemoteStreams[event.stream.id]=event.stream,config.onRemoteStream(event.stream),event.stream.getTracks().forEach(function(track){track.onended=function(){peer&&peer.onremovestream(event)}}),event.stream.onremovetrack=function(){peer&&peer.onremovestream(event)}}},peer.onremovestream=function(event){event.stream.streamid=event.stream.id,allRemoteStreams[event.stream.id]&&delete allRemoteStreams[event.stream.id],config.onRemoteStreamRemoved(event.stream)},"function"!=typeof peer.removeStream&&(peer.removeStream=function(stream){stream.getTracks().forEach(function(track){peer.removeTrack(track,stream)})}),this.addRemoteCandidate=function(remoteCandidate){peer.addIceCandidate(new RTCIceCandidate(remoteCandidate))},this.addRemoteSdp=function(remoteSdp,cb){cb=cb||function(){},"Safari"!==DetectRTC.browser.name&&(remoteSdp.sdp=connection.processSdp(remoteSdp.sdp)),peer.setRemoteDescription(new RTCSessionDescription(remoteSdp)).then(cb,function(error){connection.enableLogs&&console.error("setRemoteDescription failed","\n",error,"\n",remoteSdp.sdp),cb()})["catch"](function(error){connection.enableLogs&&console.error("setRemoteDescription failed","\n",error,"\n",remoteSdp.sdp),cb()})};var isOfferer=!0;config.remoteSdp&&(isOfferer=!1),this.createDataChannel=function(){var channel=peer.createDataChannel("sctp",{});setChannelEvents(channel)},connection.session.data!==!0||renegotiatingPeer||(isOfferer?this.createDataChannel():peer.ondatachannel=function(event){var channel=event.channel;setChannelEvents(channel)}),this.enableDisableVideoEncoding=function(enable){var rtcp;if(peer.getSenders().forEach(function(sender){rtcp||"video"!==sender.track.kind||(rtcp=sender)}),rtcp&&rtcp.getParameters){var parameters=rtcp.getParameters();parameters.encodings[1]&&(parameters.encodings[1].active=!!enable),parameters.encodings[2]&&(parameters.encodings[2].active=!!enable),rtcp.setParameters(parameters)}},config.remoteSdp&&(config.remoteSdp.remotePeerSdpConstraints&&(sdpConstraints=config.remoteSdp.remotePeerSdpConstraints),defaults.sdpConstraints=setSdpConstraints(sdpConstraints),this.addRemoteSdp(config.remoteSdp,function(){createOfferOrAnswer("createAnswer")})),"two-way"!=connection.session.audio&&"two-way"!=connection.session.video&&"two-way"!=connection.session.screen||(defaults.sdpConstraints=setSdpConstraints({OfferToReceiveAudio:"two-way"==connection.session.audio||config.remoteSdp&&config.remoteSdp.remotePeerSdpConstraints&&config.remoteSdp.remotePeerSdpConstraints.OfferToReceiveAudio,OfferToReceiveVideo:"two-way"==connection.session.video||"two-way"==connection.session.screen||config.remoteSdp&&config.remoteSdp.remotePeerSdpConstraints&&config.remoteSdp.remotePeerSdpConstraints.OfferToReceiveAudio}));var streamsToShare={};peer.getLocalStreams().forEach(function(stream){streamsToShare[stream.streamid]={isAudio:!!stream.isAudio,isVideo:!!stream.isVideo,isScreen:!!stream.isScreen}}),isOfferer&&createOfferOrAnswer("createOffer"),peer.nativeClose=peer.close,peer.close=function(){if(peer){try{peer.nativeClose!==peer.close&&peer.nativeClose()}catch(e){}peer=null,self.peer=null}},this.peer=peer}function setStreamType(constraints,stream){constraints.mandatory&&constraints.mandatory.chromeMediaSource?stream.isScreen=!0:constraints.mozMediaSource||constraints.mediaSource?stream.isScreen=!0:constraints.video?stream.isVideo=!0:constraints.audio&&(stream.isAudio=!0)}function getUserMediaHandler(options){function streaming(stream,returnBack){setStreamType(options.localMediaConstraints,stream);var streamEndedEvent="ended";"oninactive"in stream&&(streamEndedEvent="inactive"),stream.addEventListener(streamEndedEvent,function(){delete currentUserMediaRequest.streams[idInstance],currentUserMediaRequest.mutex=!1,currentUserMediaRequest.queueRequests.indexOf(options)&&(delete currentUserMediaRequest.queueRequests[currentUserMediaRequest.queueRequests.indexOf(options)],currentUserMediaRequest.queueRequests=removeNullEntries(currentUserMediaRequest.queueRequests))},!1),currentUserMediaRequest.streams[idInstance]={stream:stream},currentUserMediaRequest.mutex=!1,currentUserMediaRequest.queueRequests.length&&getUserMediaHandler(currentUserMediaRequest.queueRequests.shift()),options.onGettingLocalMedia(stream,returnBack)}if(currentUserMediaRequest.mutex===!0)return void currentUserMediaRequest.queueRequests.push(options);currentUserMediaRequest.mutex=!0;var idInstance=JSON.stringify(options.localMediaConstraints);if(currentUserMediaRequest.streams[idInstance])streaming(currentUserMediaRequest.streams[idInstance].stream,!0);else{var isBlackBerry=!!/BB10|BlackBerry/i.test(navigator.userAgent||"");if(isBlackBerry||"undefined"==typeof navigator.mediaDevices||"function"!=typeof navigator.mediaDevices.getUserMedia)return navigator.getUserMedia=navigator.getUserMedia||navigator.webkitGetUserMedia||navigator.mozGetUserMedia,void navigator.getUserMedia(options.localMediaConstraints,function(stream){stream.streamid=stream.streamid||stream.id||getRandomString(),stream.idInstance=idInstance,streaming(stream)},function(error){options.onLocalMediaError(error,options.localMediaConstraints)});if("undefined"==typeof navigator.mediaDevices){navigator.getUserMedia=navigator.getUserMedia||navigator.webkitGetUserMedia||navigator.mozGetUserMedia;var getUserMediaStream,getUserMediaError,getUserMediaSuccess=function(){},getUserMediaFailure=function(){};navigator.mediaDevices={getUserMedia:function(hints){return navigator.getUserMedia(hints,function(getUserMediaSuccess){getUserMediaSuccess(stream),getUserMediaStream=stream},function(error){getUserMediaFailure(error),getUserMediaError=error}),{then:function(successCB){return getUserMediaStream?void successCB(getUserMediaStream):(getUserMediaSuccess=successCB,{then:function(failureCB){return getUserMediaError?void failureCB(getUserMediaError):void(getUserMediaFailure=failureCB)}})}}}}}if(options.localMediaConstraints.isScreen===!0){if(navigator.mediaDevices.getDisplayMedia)navigator.mediaDevices.getDisplayMedia(options.localMediaConstraints).then(function(stream){stream.streamid=stream.streamid||stream.id||getRandomString(),stream.idInstance=idInstance,streaming(stream)})["catch"](function(error){options.onLocalMediaError(error,options.localMediaConstraints)});else{if(!navigator.getDisplayMedia)throw new Error("getDisplayMedia API is not availabe in this browser.");navigator.getDisplayMedia(options.localMediaConstraints).then(function(stream){stream.streamid=stream.streamid||stream.id||getRandomString(),stream.idInstance=idInstance,streaming(stream)})["catch"](function(error){options.onLocalMediaError(error,options.localMediaConstraints)})}return}navigator.mediaDevices.getUserMedia(options.localMediaConstraints).then(function(stream){stream.streamid=stream.streamid||stream.id||getRandomString(),stream.idInstance=idInstance,streaming(stream)})["catch"](function(error){options.onLocalMediaError(error,options.localMediaConstraints)})}}function TextReceiver(connection){function receive(data,userid,extra){var uuid=data.uuid;if(content[uuid]||(content[uuid]=[]),content[uuid].push(data.message),data.last){var message=content[uuid].join("");data.isobject&&(message=JSON.parse(message));var receivingTime=(new Date).getTime(),latency=receivingTime-data.sendingTime,e={data:message,userid:userid,extra:extra,latency:latency};connection.autoTranslateText?(e.original=e.data,connection.Translator.TranslateText(e.data,function(translatedText){e.data=translatedText,connection.onmessage(e)})):connection.onmessage(e),delete content[uuid]}}var content={};return{receive:receive}}var browserFakeUserAgent="Fake/5.0 (FakeOS) AppleWebKit/123 (KHTML, like Gecko) Fake/12.3.4567.89 Fake/123.45";!function(that){that&&"undefined"==typeof window&&"undefined"!=typeof global&&(global.navigator={userAgent:browserFakeUserAgent,getUserMedia:function(){}},global.console||(global.console={}),"undefined"==typeof global.console.debug&&(global.console.debug=global.console.info=global.console.error=global.console.log=global.console.log||function(){console.log(arguments)}),"undefined"==typeof document&&(that.document={},document.createElement=document.captureStream=document.mozCaptureStream=function(){var obj={getContext:function(){return obj},play:function(){},pause:function(){},drawImage:function(){},toDataURL:function(){return""}};return obj},document.addEventListener=document.removeEventListener=that.addEventListener=that.removeEventListener=function(){},that.HTMLVideoElement=that.HTMLMediaElement=function(){}),"undefined"==typeof io&&(that.io=function(){return{on:function(eventName,callback){callback=callback||function(){},"connect"===eventName&&callback()},emit:function(eventName,data,callback){callback=callback||function(){},"open-room"!==eventName&&"join-room"!==eventName||callback(!0,data.sessionid,null)}}}),"undefined"==typeof location&&(that.location={protocol:"file:",href:"",hash:"",origin:"self"}),"undefined"==typeof screen&&(that.screen={width:0,height:0}),"undefined"==typeof URL&&(that.URL={createObjectURL:function(){return""},revokeObjectURL:function(){return""}}),that.window=global)}("undefined"!=typeof global?global:null),function(){function getBrowserInfo(){var nameOffset,verOffset,ix,nAgt=(navigator.appVersion,navigator.userAgent),browserName=navigator.appName,fullVersion=""+parseFloat(navigator.appVersion),majorVersion=parseInt(navigator.appVersion,10);if(isSafari&&!isChrome&&nAgt.indexOf("CriOS")!==-1&&(isSafari=!1,isChrome=!0),isOpera){browserName="Opera";try{fullVersion=navigator.userAgent.split("OPR/")[1].split(" ")[0],majorVersion=fullVersion.split(".")[0]}catch(e){fullVersion="0.0.0.0",majorVersion=0}}else isIE?(verOffset=nAgt.indexOf("rv:"),verOffset>0?fullVersion=nAgt.substring(verOffset+3):(verOffset=nAgt.indexOf("MSIE"),fullVersion=nAgt.substring(verOffset+5)),browserName="IE"):isChrome?(verOffset=nAgt.indexOf("Chrome"),browserName="Chrome",fullVersion=nAgt.substring(verOffset+7)):isSafari?(verOffset=nAgt.indexOf("Safari"),browserName="Safari",fullVersion=nAgt.substring(verOffset+7),(verOffset=nAgt.indexOf("Version"))!==-1&&(fullVersion=nAgt.substring(verOffset+8)),navigator.userAgent.indexOf("Version/")!==-1&&(fullVersion=navigator.userAgent.split("Version/")[1].split(" ")[0])):isFirefox?(verOffset=nAgt.indexOf("Firefox"),browserName="Firefox",fullVersion=nAgt.substring(verOffset+8)):(nameOffset=nAgt.lastIndexOf(" ")+1)<(verOffset=nAgt.lastIndexOf("/"))&&(browserName=nAgt.substring(nameOffset,verOffset),fullVersion=nAgt.substring(verOffset+1),browserName.toLowerCase()===browserName.toUpperCase()&&(browserName=navigator.appName));return isEdge&&(browserName="Edge",fullVersion=navigator.userAgent.split("Edge/")[1]),(ix=fullVersion.search(/[; \)]/))!==-1&&(fullVersion=fullVersion.substring(0,ix)),majorVersion=parseInt(""+fullVersion,10),isNaN(majorVersion)&&(fullVersion=""+parseFloat(navigator.appVersion),majorVersion=parseInt(navigator.appVersion,10)),{fullVersion:fullVersion,version:majorVersion,name:browserName,isPrivateBrowsing:!1}}function retry(isDone,next){var currentTrial=0,maxRetry=50,isTimeout=!1,id=window.setInterval(function(){isDone()&&(window.clearInterval(id),next(isTimeout)),currentTrial++>maxRetry&&(window.clearInterval(id),isTimeout=!0,next(isTimeout))},10)}function isIE10OrLater(userAgent){var ua=userAgent.toLowerCase();if(0===ua.indexOf("msie")&&0===ua.indexOf("trident"))return!1;var match=/(?:msie|rv:)\s?([\d\.]+)/.exec(ua);return!!(match&&parseInt(match[1],10)>=10)}function detectPrivateMode(callback){var isPrivate;try{if(window.webkitRequestFileSystem)window.webkitRequestFileSystem(window.TEMPORARY,1,function(){isPrivate=!1},function(e){isPrivate=!0});else if(window.indexedDB&&/Firefox/.test(window.navigator.userAgent)){var db;try{db=window.indexedDB.open("test"),db.onerror=function(){return!0}}catch(e){isPrivate=!0}"undefined"==typeof isPrivate&&retry(function(){return"done"===db.readyState},function(isTimeout){isTimeout||(isPrivate=!db.result)})}else if(isIE10OrLater(window.navigator.userAgent)){isPrivate=!1;try{window.indexedDB||(isPrivate=!0)}catch(e){isPrivate=!0}}else if(window.localStorage&&/Safari/.test(window.navigator.userAgent)){try{window.localStorage.setItem("test",1)}catch(e){isPrivate=!0}"undefined"==typeof isPrivate&&(isPrivate=!1,window.localStorage.removeItem("test"))}}catch(e){isPrivate=!1}retry(function(){return"undefined"!=typeof isPrivate},function(isTimeout){callback(isPrivate)})}function detectDesktopOS(){for(var cs,unknown="-",nVer=navigator.appVersion,nAgt=navigator.userAgent,os=unknown,clientStrings=[{s:"Windows 10",r:/(Windows 10.0|Windows NT 10.0)/},{s:"Windows 8.1",r:/(Windows 8.1|Windows NT 6.3)/},{s:"Windows 8",r:/(Windows 8|Windows NT 6.2)/},{s:"Windows 7",r:/(Windows 7|Windows NT 6.1)/},{s:"Windows Vista",r:/Windows NT 6.0/},{s:"Windows Server 2003",r:/Windows NT 5.2/},{s:"Windows XP",r:/(Windows NT 5.1|Windows XP)/},{s:"Windows 2000",r:/(Windows NT 5.0|Windows 2000)/},{s:"Windows ME",r:/(Win 9x 4.90|Windows ME)/},{s:"Windows 98",r:/(Windows 98|Win98)/},{s:"Windows 95",r:/(Windows 95|Win95|Windows_95)/},{s:"Windows NT 4.0",r:/(Windows NT 4.0|WinNT4.0|WinNT|Windows NT)/},{s:"Windows CE",r:/Windows CE/},{s:"Windows 3.11",r:/Win16/},{s:"Android",r:/Android/},{s:"Open BSD",r:/OpenBSD/},{s:"Sun OS",r:/SunOS/},{s:"Linux",r:/(Linux|X11)/},{s:"iOS",r:/(iPhone|iPad|iPod)/},{s:"Mac OS X",r:/Mac OS X/},{s:"Mac OS",r:/(MacPPC|MacIntel|Mac_PowerPC|Macintosh)/},{s:"QNX",r:/QNX/},{s:"UNIX",r:/UNIX/},{s:"BeOS",r:/BeOS/},{s:"OS/2",r:/OS\/2/},{s:"Search Bot",r:/(nuhk|Googlebot|Yammybot|Openbot|Slurp|MSNBot|Ask Jeeves\/Teoma|ia_archiver)/}],i=0;cs=clientStrings[i];i++)if(cs.r.test(nAgt)){os=cs.s;break}var osVersion=unknown;switch(/Windows/.test(os)&&(/Windows (.*)/.test(os)&&(osVersion=/Windows (.*)/.exec(os)[1]),os="Windows"),os){case"Mac OS X":/Mac OS X (10[\.\_\d]+)/.test(nAgt)&&(osVersion=/Mac OS X (10[\.\_\d]+)/.exec(nAgt)[1]);break;case"Android":/Android ([\.\_\d]+)/.test(nAgt)&&(osVersion=/Android ([\.\_\d]+)/.exec(nAgt)[1]);break;case"iOS":/OS (\d+)_(\d+)_?(\d+)?/.test(nAgt)&&(osVersion=/OS (\d+)_(\d+)_?(\d+)?/.exec(nVer),osVersion=osVersion[1]+"."+osVersion[2]+"."+(0|osVersion[3]))}return{osName:os,osVersion:osVersion}}function getAndroidVersion(ua){ua=(ua||navigator.userAgent).toLowerCase();var match=ua.match(/android\s([0-9\.]*)/);return!!match&&match[1]}function DetectLocalIPAddress(callback,stream){if(DetectRTC.isWebRTCSupported){var isPublic=!0,isIpv4=!0;getIPs(function(ip){ip?ip.match(regexIpv4Local)?(isPublic=!1,callback("Local: "+ip,isPublic,isIpv4)):ip.match(regexIpv6)?(isIpv4=!1,callback("Public: "+ip,isPublic,isIpv4)):callback("Public: "+ip,isPublic,isIpv4):callback()},stream)}}function getIPs(callback,stream){function handleCandidate(candidate){if(!candidate)return void callback();var match=regexIpv4.exec(candidate);if(match){var ipAddress=match[1],isPublic=candidate.match(regexIpv4Local),isIpv4=!0;void 0===ipDuplicates[ipAddress]&&callback(ipAddress,isPublic,isIpv4),ipDuplicates[ipAddress]=!0}}function afterCreateOffer(){var lines=pc.localDescription.sdp.split("\n");lines.forEach(function(line){line&&0===line.indexOf("a=candidate:")&&handleCandidate(line)})}if("undefined"!=typeof document&&"function"==typeof document.getElementById){var ipDuplicates={},RTCPeerConnection=window.RTCPeerConnection||window.mozRTCPeerConnection||window.webkitRTCPeerConnection;if(!RTCPeerConnection){var iframe=document.getElementById("iframe");if(!iframe)return;var win=iframe.contentWindow;RTCPeerConnection=win.RTCPeerConnection||win.mozRTCPeerConnection||win.webkitRTCPeerConnection}if(RTCPeerConnection){var peerConfig=null;"Chrome"===DetectRTC.browser&&DetectRTC.browser.version<58&&(peerConfig={optional:[{RtpDataChannels:!0}]});var servers={iceServers:[{urls:"stun:stun.l.google.com:19302"}]},pc=new RTCPeerConnection(servers,peerConfig);if(stream&&(pc.addStream?pc.addStream(stream):pc.addTrack&&stream.getTracks()[0]&&pc.addTrack(stream.getTracks()[0],stream)),pc.onicecandidate=function(event){event.candidate&&event.candidate.candidate?handleCandidate(event.candidate.candidate):handleCandidate()},!stream)try{pc.createDataChannel("sctp",{})}catch(e){}DetectRTC.isPromisesSupported?pc.createOffer().then(function(result){pc.setLocalDescription(result).then(afterCreateOffer)}):pc.createOffer(function(result){pc.setLocalDescription(result,afterCreateOffer,function(){})},function(){})}}}function checkDeviceSupport(callback){if(!canEnumerate)return void(callback&&callback());if(!navigator.enumerateDevices&&window.MediaStreamTrack&&window.MediaStreamTrack.getSources&&(navigator.enumerateDevices=window.MediaStreamTrack.getSources.bind(window.MediaStreamTrack)),!navigator.enumerateDevices&&navigator.enumerateDevices&&(navigator.enumerateDevices=navigator.enumerateDevices.bind(navigator)),!navigator.enumerateDevices)return void(callback&&callback());MediaDevices=[],audioInputDevices=[],audioOutputDevices=[],videoInputDevices=[],hasMicrophone=!1,hasSpeakers=!1,hasWebcam=!1,isWebsiteHasMicrophonePermissions=!1,isWebsiteHasWebcamPermissions=!1;var alreadyUsedDevices={};navigator.enumerateDevices(function(devices){devices.forEach(function(_device){var device={};for(var d in _device)try{"function"!=typeof _device[d]&&(device[d]=_device[d])}catch(e){}alreadyUsedDevices[device.deviceId+device.label+device.kind]||("audio"===device.kind&&(device.kind="audioinput"),"video"===device.kind&&(device.kind="videoinput"),device.deviceId||(device.deviceId=device.id),device.id||(device.id=device.deviceId),device.label?("videoinput"!==device.kind||isWebsiteHasWebcamPermissions||(isWebsiteHasWebcamPermissions=!0),"audioinput"!==device.kind||isWebsiteHasMicrophonePermissions||(isWebsiteHasMicrophonePermissions=!0)):(device.isCustomLabel=!0,"videoinput"===device.kind?device.label="Camera "+(videoInputDevices.length+1):"audioinput"===device.kind?device.label="Microphone "+(audioInputDevices.length+1):"audiooutput"===device.kind?device.label="Speaker "+(audioOutputDevices.length+1):device.label="Please invoke getUserMedia once.","undefined"!=typeof DetectRTC&&DetectRTC.browser.isChrome&&DetectRTC.browser.version>=46&&!/^(https:|chrome-extension:)$/g.test(location.protocol||"")&&"undefined"!=typeof document&&"string"==typeof document.domain&&document.domain.search&&document.domain.search(/localhost|127.0./g)===-1&&(device.label="HTTPs is required to get label of this "+device.kind+" device.")),"audioinput"===device.kind&&(hasMicrophone=!0,audioInputDevices.indexOf(device)===-1&&audioInputDevices.push(device)),"audiooutput"===device.kind&&(hasSpeakers=!0,audioOutputDevices.indexOf(device)===-1&&audioOutputDevices.push(device)),"videoinput"===device.kind&&(hasWebcam=!0,videoInputDevices.indexOf(device)===-1&&videoInputDevices.push(device)),MediaDevices.push(device),alreadyUsedDevices[device.deviceId+device.label+device.kind]=device)}),"undefined"!=typeof DetectRTC&&(DetectRTC.MediaDevices=MediaDevices,DetectRTC.hasMicrophone=hasMicrophone,DetectRTC.hasSpeakers=hasSpeakers,DetectRTC.hasWebcam=hasWebcam,DetectRTC.isWebsiteHasWebcamPermissions=isWebsiteHasWebcamPermissions,DetectRTC.isWebsiteHasMicrophonePermissions=isWebsiteHasMicrophonePermissions,DetectRTC.audioInputDevices=audioInputDevices,DetectRTC.audioOutputDevices=audioOutputDevices,DetectRTC.videoInputDevices=videoInputDevices),callback&&callback()})}function getAspectRatio(w,h){function gcd(a,b){return 0==b?a:gcd(b,a%b)}var r=gcd(w,h);return w/r/(h/r)}var browserFakeUserAgent="Fake/5.0 (FakeOS) AppleWebKit/123 (KHTML, like Gecko) Fake/12.3.4567.89 Fake/123.45",isNodejs="object"==typeof process&&"object"==typeof process.versions&&process.versions.node&&!process.browser;if(isNodejs){var version=process.versions.node.toString().replace("v","");browserFakeUserAgent="Nodejs/"+version+" (NodeOS) AppleWebKit/"+version+" (KHTML, like Gecko) Nodejs/"+version+" Nodejs/"+version}!function(that){"undefined"==typeof window&&("undefined"==typeof window&&"undefined"!=typeof global?(global.navigator={userAgent:browserFakeUserAgent,getUserMedia:function(){}},that.window=global):"undefined"==typeof window,"undefined"==typeof location&&(that.location={protocol:"file:",href:"",hash:""}),"undefined"==typeof screen&&(that.screen={width:0,height:0}))}("undefined"!=typeof global?global:window);var navigator=window.navigator;"undefined"!=typeof navigator?("undefined"!=typeof navigator.webkitGetUserMedia&&(navigator.getUserMedia=navigator.webkitGetUserMedia),"undefined"!=typeof navigator.mozGetUserMedia&&(navigator.getUserMedia=navigator.mozGetUserMedia)):navigator={getUserMedia:function(){},userAgent:browserFakeUserAgent};var isMobileDevice=!!/Android|webOS|iPhone|iPad|iPod|BB10|BlackBerry|IEMobile|Opera Mini|Mobile|mobile/i.test(navigator.userAgent||""),isEdge=!(navigator.userAgent.indexOf("Edge")===-1||!navigator.msSaveOrOpenBlob&&!navigator.msSaveBlob),isOpera=!!window.opera||navigator.userAgent.indexOf(" OPR/")>=0,isFirefox="undefined"!=typeof window.InstallTrigger,isSafari=/^((?!chrome|android).)*safari/i.test(navigator.userAgent),isChrome=!!window.chrome&&!isOpera,isIE="undefined"!=typeof document&&!!document.documentMode&&!isEdge,isMobile={Android:function(){return navigator.userAgent.match(/Android/i)},BlackBerry:function(){return navigator.userAgent.match(/BlackBerry|BB10/i)},iOS:function(){return navigator.userAgent.match(/iPhone|iPad|iPod/i)},Opera:function(){return navigator.userAgent.match(/Opera Mini/i)},Windows:function(){return navigator.userAgent.match(/IEMobile/i)},any:function(){return isMobile.Android()||isMobile.BlackBerry()||isMobile.iOS()||isMobile.Opera()||isMobile.Windows()},getOsName:function(){var osName="Unknown OS";return isMobile.Android()&&(osName="Android"),isMobile.BlackBerry()&&(osName="BlackBerry"),isMobile.iOS()&&(osName="iOS"),isMobile.Opera()&&(osName="Opera Mini"),isMobile.Windows()&&(osName="Windows"),osName}},osName="Unknown OS",osVersion="Unknown OS Version",osInfo=detectDesktopOS();osInfo&&osInfo.osName&&"-"!=osInfo.osName?(osName=osInfo.osName,osVersion=osInfo.osVersion):isMobile.any()&&(osName=isMobile.getOsName(),"Android"==osName&&(osVersion=getAndroidVersion()));var isNodejs="object"==typeof process&&"object"==typeof process.versions&&process.versions.node;"Unknown OS"===osName&&isNodejs&&(osName="Nodejs",osVersion=process.versions.node.toString().replace("v",""));var isCanvasSupportsStreamCapturing=!1,isVideoSupportsStreamCapturing=!1;["captureStream","mozCaptureStream","webkitCaptureStream"].forEach(function(item){"undefined"!=typeof document&&"function"==typeof document.createElement&&(!isCanvasSupportsStreamCapturing&&item in document.createElement("canvas")&&(isCanvasSupportsStreamCapturing=!0),!isVideoSupportsStreamCapturing&&item in document.createElement("video")&&(isVideoSupportsStreamCapturing=!0))});var regexIpv4Local=/^(192\.168\.|169\.254\.|10\.|172\.(1[6-9]|2\d|3[01]))/,regexIpv4=/([0-9]{1,3}(\.[0-9]{1,3}){3})/,regexIpv6=/[a-f0-9]{1,4}(:[a-f0-9]{1,4}){7}/,MediaDevices=[],audioInputDevices=[],audioOutputDevices=[],videoInputDevices=[];navigator.mediaDevices&&navigator.mediaDevices.enumerateDevices&&(navigator.enumerateDevices=function(callback){var enumerateDevices=navigator.mediaDevices.enumerateDevices();enumerateDevices&&enumerateDevices.then?navigator.mediaDevices.enumerateDevices().then(callback)["catch"](function(){callback([])}):callback([])});var canEnumerate=!1;"undefined"!=typeof MediaStreamTrack&&"getSources"in MediaStreamTrack?canEnumerate=!0:navigator.mediaDevices&&navigator.mediaDevices.enumerateDevices&&(canEnumerate=!0);var hasMicrophone=!1,hasSpeakers=!1,hasWebcam=!1,isWebsiteHasMicrophonePermissions=!1,isWebsiteHasWebcamPermissions=!1,DetectRTC=window.DetectRTC||{};DetectRTC.browser=getBrowserInfo(),detectPrivateMode(function(isPrivateBrowsing){DetectRTC.browser.isPrivateBrowsing=!!isPrivateBrowsing}),DetectRTC.browser["is"+DetectRTC.browser.name]=!0,DetectRTC.osName=osName,DetectRTC.osVersion=osVersion;var isWebRTCSupported=("object"==typeof process&&"object"==typeof process.versions&&process.versions["node-webkit"],!1);["RTCPeerConnection","webkitRTCPeerConnection","mozRTCPeerConnection","RTCIceGatherer"].forEach(function(item){isWebRTCSupported||item in window&&(isWebRTCSupported=!0)}),DetectRTC.isWebRTCSupported=isWebRTCSupported,DetectRTC.isORTCSupported="undefined"!=typeof RTCIceGatherer;var isScreenCapturingSupported=!1;if(DetectRTC.browser.isChrome&&DetectRTC.browser.version>=35?isScreenCapturingSupported=!0:DetectRTC.browser.isFirefox&&DetectRTC.browser.version>=34?isScreenCapturingSupported=!0:DetectRTC.browser.isEdge&&DetectRTC.browser.version>=17?isScreenCapturingSupported=!0:"Android"===DetectRTC.osName&&DetectRTC.browser.isChrome&&(isScreenCapturingSupported=!0),!/^(https:|chrome-extension:)$/g.test(location.protocol||"")){var isNonLocalHost="undefined"!=typeof document&&"string"==typeof document.domain&&document.domain.search&&document.domain.search(/localhost|127.0./g)===-1;isNonLocalHost&&(DetectRTC.browser.isChrome||DetectRTC.browser.isEdge||DetectRTC.browser.isOpera)?isScreenCapturingSupported=!1:DetectRTC.browser.isFirefox&&(isScreenCapturingSupported=!1)}DetectRTC.isScreenCapturingSupported=isScreenCapturingSupported;var webAudio={isSupported:!1,isCreateMediaStreamSourceSupported:!1};["AudioContext","webkitAudioContext","mozAudioContext","msAudioContext"].forEach(function(item){webAudio.isSupported||item in window&&(webAudio.isSupported=!0,window[item]&&"createMediaStreamSource"in window[item].prototype&&(webAudio.isCreateMediaStreamSourceSupported=!0))}),DetectRTC.isAudioContextSupported=webAudio.isSupported,DetectRTC.isCreateMediaStreamSourceSupported=webAudio.isCreateMediaStreamSourceSupported;var isRtpDataChannelsSupported=!1;DetectRTC.browser.isChrome&&DetectRTC.browser.version>31&&(isRtpDataChannelsSupported=!0),DetectRTC.isRtpDataChannelsSupported=isRtpDataChannelsSupported;var isSCTPSupportd=!1;DetectRTC.browser.isFirefox&&DetectRTC.browser.version>28?isSCTPSupportd=!0:DetectRTC.browser.isChrome&&DetectRTC.browser.version>25?isSCTPSupportd=!0:DetectRTC.browser.isOpera&&DetectRTC.browser.version>=11&&(isSCTPSupportd=!0),DetectRTC.isSctpDataChannelsSupported=isSCTPSupportd,DetectRTC.isMobileDevice=isMobileDevice;var isGetUserMediaSupported=!1;navigator.getUserMedia?isGetUserMediaSupported=!0:navigator.mediaDevices&&navigator.mediaDevices.getUserMedia&&(isGetUserMediaSupported=!0),DetectRTC.browser.isChrome&&DetectRTC.browser.version>=46&&!/^(https:|chrome-extension:)$/g.test(location.protocol||"")&&"undefined"!=typeof document&&"string"==typeof document.domain&&document.domain.search&&document.domain.search(/localhost|127.0./g)===-1&&(isGetUserMediaSupported="Requires HTTPs"),"Nodejs"===DetectRTC.osName&&(isGetUserMediaSupported=!1),DetectRTC.isGetUserMediaSupported=isGetUserMediaSupported;var displayResolution="";if(screen.width){var width=screen.width?screen.width:"",height=screen.height?screen.height:"";displayResolution+=""+width+" x "+height}DetectRTC.displayResolution=displayResolution,DetectRTC.displayAspectRatio=getAspectRatio(screen.width,screen.height).toFixed(2),DetectRTC.isCanvasSupportsStreamCapturing=isCanvasSupportsStreamCapturing,DetectRTC.isVideoSupportsStreamCapturing=isVideoSupportsStreamCapturing,"Chrome"==DetectRTC.browser.name&&DetectRTC.browser.version>=53&&(DetectRTC.isCanvasSupportsStreamCapturing||(DetectRTC.isCanvasSupportsStreamCapturing="Requires chrome flag: enable-experimental-web-platform-features"),DetectRTC.isVideoSupportsStreamCapturing||(DetectRTC.isVideoSupportsStreamCapturing="Requires chrome flag: enable-experimental-web-platform-features")),DetectRTC.DetectLocalIPAddress=DetectLocalIPAddress,DetectRTC.isWebSocketsSupported="WebSocket"in window&&2===window.WebSocket.CLOSING,DetectRTC.isWebSocketsBlocked=!DetectRTC.isWebSocketsSupported,"Nodejs"===DetectRTC.osName&&(DetectRTC.isWebSocketsSupported=!0,DetectRTC.isWebSocketsBlocked=!1),DetectRTC.checkWebSocketsSupport=function(callback){callback=callback||function(){};try{var starttime,websocket=new WebSocket("wss://echo.websocket.org:443/");websocket.onopen=function(){DetectRTC.isWebSocketsBlocked=!1,starttime=(new Date).getTime(),websocket.send("ping")},websocket.onmessage=function(){DetectRTC.WebsocketLatency=(new Date).getTime()-starttime+"ms",callback(),websocket.close(),websocket=null},websocket.onerror=function(){DetectRTC.isWebSocketsBlocked=!0,callback()}}catch(e){DetectRTC.isWebSocketsBlocked=!0,callback()}},DetectRTC.load=function(callback){callback=callback||function(){},checkDeviceSupport(callback)},"undefined"!=typeof MediaDevices?DetectRTC.MediaDevices=MediaDevices:DetectRTC.MediaDevices=[],DetectRTC.hasMicrophone=hasMicrophone,DetectRTC.hasSpeakers=hasSpeakers,DetectRTC.hasWebcam=hasWebcam,DetectRTC.isWebsiteHasWebcamPermissions=isWebsiteHasWebcamPermissions,DetectRTC.isWebsiteHasMicrophonePermissions=isWebsiteHasMicrophonePermissions,DetectRTC.audioInputDevices=audioInputDevices,DetectRTC.audioOutputDevices=audioOutputDevices,DetectRTC.videoInputDevices=videoInputDevices;var isSetSinkIdSupported=!1;"undefined"!=typeof document&&"function"==typeof document.createElement&&"setSinkId"in document.createElement("video")&&(isSetSinkIdSupported=!0),DetectRTC.isSetSinkIdSupported=isSetSinkIdSupported;var isRTPSenderReplaceTracksSupported=!1;DetectRTC.browser.isFirefox&&"undefined"!=typeof mozRTCPeerConnection?"getSenders"in mozRTCPeerConnection.prototype&&(isRTPSenderReplaceTracksSupported=!0):DetectRTC.browser.isChrome&&"undefined"!=typeof webkitRTCPeerConnection&&"getSenders"in webkitRTCPeerConnection.prototype&&(isRTPSenderReplaceTracksSupported=!0),DetectRTC.isRTPSenderReplaceTracksSupported=isRTPSenderReplaceTracksSupported;var isRemoteStreamProcessingSupported=!1;DetectRTC.browser.isFirefox&&DetectRTC.browser.version>38&&(isRemoteStreamProcessingSupported=!0),DetectRTC.isRemoteStreamProcessingSupported=isRemoteStreamProcessingSupported;var isApplyConstraintsSupported=!1;"undefined"!=typeof MediaStreamTrack&&"applyConstraints"in MediaStreamTrack.prototype&&(isApplyConstraintsSupported=!0),DetectRTC.isApplyConstraintsSupported=isApplyConstraintsSupported;var isMultiMonitorScreenCapturingSupported=!1;DetectRTC.browser.isFirefox&&DetectRTC.browser.version>=43&&(isMultiMonitorScreenCapturingSupported=!0),DetectRTC.isMultiMonitorScreenCapturingSupported=isMultiMonitorScreenCapturingSupported,DetectRTC.isPromisesSupported=!!("Promise"in window),DetectRTC.version="1.3.9","undefined"==typeof DetectRTC&&(window.DetectRTC={});var MediaStream=window.MediaStream;"undefined"==typeof MediaStream&&"undefined"!=typeof webkitMediaStream&&(MediaStream=webkitMediaStream),"undefined"!=typeof MediaStream&&"function"==typeof MediaStream?DetectRTC.MediaStream=Object.keys(MediaStream.prototype):DetectRTC.MediaStream=!1,"undefined"!=typeof MediaStreamTrack?DetectRTC.MediaStreamTrack=Object.keys(MediaStreamTrack.prototype):DetectRTC.MediaStreamTrack=!1;var RTCPeerConnection=window.RTCPeerConnection||window.mozRTCPeerConnection||window.webkitRTCPeerConnection;"undefined"!=typeof RTCPeerConnection?DetectRTC.RTCPeerConnection=Object.keys(RTCPeerConnection.prototype):DetectRTC.RTCPeerConnection=!1,window.DetectRTC=DetectRTC,"undefined"!=typeof module&&(module.exports=DetectRTC),"function"==typeof define&&define.amd&&define("DetectRTC",[],function(){return DetectRTC})}(),"undefined"!=typeof cordova&&(DetectRTC.isMobileDevice=!0,DetectRTC.browser.name="Chrome"),navigator&&navigator.userAgent&&navigator.userAgent.indexOf("Crosswalk")!==-1&&(DetectRTC.isMobileDevice=!0,DetectRTC.browser.name="Chrome"),window.addEventListener||(window.addEventListener=function(el,eventName,eventHandler){
-el.attachEvent&&el.attachEvent("on"+eventName,eventHandler)}),window.attachEventListener=function(video,type,listener,useCapture){video.addEventListener(type,listener,useCapture)};var MediaStream=window.MediaStream;"undefined"==typeof MediaStream&&"undefined"!=typeof webkitMediaStream&&(MediaStream=webkitMediaStream),"undefined"!=typeof MediaStream&&("stop"in MediaStream.prototype||(MediaStream.prototype.stop=function(){this.getTracks().forEach(function(track){track.stop()})})),window.iOSDefaultAudioOutputDevice=window.iOSDefaultAudioOutputDevice||"speaker",document.addEventListener("deviceready",setCordovaAPIs,!1),setCordovaAPIs();var RTCPeerConnection,defaults={};"undefined"!=typeof window.RTCPeerConnection?RTCPeerConnection=window.RTCPeerConnection:"undefined"!=typeof mozRTCPeerConnection?RTCPeerConnection=mozRTCPeerConnection:"undefined"!=typeof webkitRTCPeerConnection&&(RTCPeerConnection=webkitRTCPeerConnection);var RTCSessionDescription=window.RTCSessionDescription||window.mozRTCSessionDescription,RTCIceCandidate=window.RTCIceCandidate||window.mozRTCIceCandidate,MediaStreamTrack=window.MediaStreamTrack,CodecsHandler=function(){function preferCodec(sdp,codecName){var info=splitLines(sdp);return info.videoCodecNumbers?"vp8"===codecName&&info.vp8LineNumber===info.videoCodecNumbers[0]?sdp:"vp9"===codecName&&info.vp9LineNumber===info.videoCodecNumbers[0]?sdp:"h264"===codecName&&info.h264LineNumber===info.videoCodecNumbers[0]?sdp:sdp=preferCodecHelper(sdp,codecName,info):sdp}function preferCodecHelper(sdp,codec,info,ignore){var preferCodecNumber="";if("vp8"===codec){if(!info.vp8LineNumber)return sdp;preferCodecNumber=info.vp8LineNumber}if("vp9"===codec){if(!info.vp9LineNumber)return sdp;preferCodecNumber=info.vp9LineNumber}if("h264"===codec){if(!info.h264LineNumber)return sdp;preferCodecNumber=info.h264LineNumber}var newLine=info.videoCodecNumbersOriginal.split("SAVPF")[0]+"SAVPF ",newOrder=[preferCodecNumber];return ignore&&(newOrder=[]),info.videoCodecNumbers.forEach(function(codecNumber){codecNumber!==preferCodecNumber&&newOrder.push(codecNumber)}),newLine+=newOrder.join(" "),sdp=sdp.replace(info.videoCodecNumbersOriginal,newLine)}function splitLines(sdp){var info={};return sdp.split("\n").forEach(function(line){0===line.indexOf("m=video")&&(info.videoCodecNumbers=[],line.split("SAVPF")[1].split(" ").forEach(function(codecNumber){codecNumber=codecNumber.trim(),codecNumber&&codecNumber.length&&(info.videoCodecNumbers.push(codecNumber),info.videoCodecNumbersOriginal=line)})),line.indexOf("VP8/90000")===-1||info.vp8LineNumber||(info.vp8LineNumber=line.replace("a=rtpmap:","").split(" ")[0]),line.indexOf("VP9/90000")===-1||info.vp9LineNumber||(info.vp9LineNumber=line.replace("a=rtpmap:","").split(" ")[0]),line.indexOf("H264/90000")===-1||info.h264LineNumber||(info.h264LineNumber=line.replace("a=rtpmap:","").split(" ")[0])}),info}function removeVPX(sdp){var info=splitLines(sdp);return sdp=preferCodecHelper(sdp,"vp9",info,!0),sdp=preferCodecHelper(sdp,"vp8",info,!0)}function disableNACK(sdp){if(!sdp||"string"!=typeof sdp)throw"Invalid arguments.";return sdp=sdp.replace("a=rtcp-fb:126 nack\r\n",""),sdp=sdp.replace("a=rtcp-fb:126 nack pli\r\n","a=rtcp-fb:126 pli\r\n"),sdp=sdp.replace("a=rtcp-fb:97 nack\r\n",""),sdp=sdp.replace("a=rtcp-fb:97 nack pli\r\n","a=rtcp-fb:97 pli\r\n")}function prioritize(codecMimeType,peer){if(peer&&peer.getSenders&&peer.getSenders().length){if(!codecMimeType||"string"!=typeof codecMimeType)throw"Invalid arguments.";peer.getSenders().forEach(function(sender){for(var params=sender.getParameters(),i=0;i<params.codecs.length;i++)if(params.codecs[i].mimeType==codecMimeType){params.codecs.unshift(params.codecs.splice(i,1));break}sender.setParameters(params)})}}function removeNonG722(sdp){return sdp.replace(/m=audio ([0-9]+) RTP\/SAVPF ([0-9 ]*)/g,"m=audio $1 RTP/SAVPF 9")}function setBAS(sdp,bandwidth,isScreen){return bandwidth?"undefined"!=typeof isFirefox&&isFirefox?sdp:(isScreen&&(bandwidth.screen?bandwidth.screen<300&&console.warn("It seems that you are using wrong bandwidth value for screen. Screen sharing is expected to fail."):console.warn("It seems that you are not using bandwidth for screen. Screen sharing is expected to fail.")),bandwidth.screen&&isScreen&&(sdp=sdp.replace(/b=AS([^\r\n]+\r\n)/g,""),sdp=sdp.replace(/a=mid:video\r\n/g,"a=mid:video\r\nb=AS:"+bandwidth.screen+"\r\n")),(bandwidth.audio||bandwidth.video)&&(sdp=sdp.replace(/b=AS([^\r\n]+\r\n)/g,"")),bandwidth.audio&&(sdp=sdp.replace(/a=mid:audio\r\n/g,"a=mid:audio\r\nb=AS:"+bandwidth.audio+"\r\n")),bandwidth.screen?sdp=sdp.replace(/a=mid:video\r\n/g,"a=mid:video\r\nb=AS:"+bandwidth.screen+"\r\n"):bandwidth.video&&(sdp=sdp.replace(/a=mid:video\r\n/g,"a=mid:video\r\nb=AS:"+bandwidth.video+"\r\n")),sdp):sdp}function findLine(sdpLines,prefix,substr){return findLineInRange(sdpLines,0,-1,prefix,substr)}function findLineInRange(sdpLines,startLine,endLine,prefix,substr){for(var realEndLine=endLine!==-1?endLine:sdpLines.length,i=startLine;i<realEndLine;++i)if(0===sdpLines[i].indexOf(prefix)&&(!substr||sdpLines[i].toLowerCase().indexOf(substr.toLowerCase())!==-1))return i;return null}function getCodecPayloadType(sdpLine){var pattern=new RegExp("a=rtpmap:(\\d+) \\w+\\/\\d+"),result=sdpLine.match(pattern);return result&&2===result.length?result[1]:null}function setVideoBitrates(sdp,params){params=params||{};var vp8Payload,xgoogle_min_bitrate=params.min,xgoogle_max_bitrate=params.max,sdpLines=sdp.split("\r\n"),vp8Index=findLine(sdpLines,"a=rtpmap","VP8/90000");if(vp8Index&&(vp8Payload=getCodecPayloadType(sdpLines[vp8Index])),!vp8Payload)return sdp;var rtxPayload,rtxIndex=findLine(sdpLines,"a=rtpmap","rtx/90000");if(rtxIndex&&(rtxPayload=getCodecPayloadType(sdpLines[rtxIndex])),!rtxIndex)return sdp;var rtxFmtpLineIndex=findLine(sdpLines,"a=fmtp:"+rtxPayload.toString());if(null!==rtxFmtpLineIndex){var appendrtxNext="\r\n";appendrtxNext+="a=fmtp:"+vp8Payload+" x-google-min-bitrate="+(xgoogle_min_bitrate||"228")+"; x-google-max-bitrate="+(xgoogle_max_bitrate||"228"),sdpLines[rtxFmtpLineIndex]=sdpLines[rtxFmtpLineIndex].concat(appendrtxNext),sdp=sdpLines.join("\r\n")}return sdp}function setOpusAttributes(sdp,params){params=params||{};var opusPayload,sdpLines=sdp.split("\r\n"),opusIndex=findLine(sdpLines,"a=rtpmap","opus/48000");if(opusIndex&&(opusPayload=getCodecPayloadType(sdpLines[opusIndex])),!opusPayload)return sdp;var opusFmtpLineIndex=findLine(sdpLines,"a=fmtp:"+opusPayload.toString());if(null===opusFmtpLineIndex)return sdp;var appendOpusNext="";return appendOpusNext+="; stereo="+("undefined"!=typeof params.stereo?params.stereo:"1"),appendOpusNext+="; sprop-stereo="+("undefined"!=typeof params["sprop-stereo"]?params["sprop-stereo"]:"1"),"undefined"!=typeof params.maxaveragebitrate&&(appendOpusNext+="; maxaveragebitrate="+(params.maxaveragebitrate||1048576)),"undefined"!=typeof params.maxplaybackrate&&(appendOpusNext+="; maxplaybackrate="+(params.maxplaybackrate||1048576)),"undefined"!=typeof params.cbr&&(appendOpusNext+="; cbr="+("undefined"!=typeof params.cbr?params.cbr:"1")),"undefined"!=typeof params.useinbandfec&&(appendOpusNext+="; useinbandfec="+params.useinbandfec),"undefined"!=typeof params.usedtx&&(appendOpusNext+="; usedtx="+params.usedtx),"undefined"!=typeof params.maxptime&&(appendOpusNext+="\r\na=maxptime:"+params.maxptime),sdpLines[opusFmtpLineIndex]=sdpLines[opusFmtpLineIndex].concat(appendOpusNext),sdp=sdpLines.join("\r\n")}function forceStereoAudio(sdp){for(var sdpLines=sdp.split("\r\n"),fmtpLineIndex=null,i=0;i<sdpLines.length;i++)if(sdpLines[i].search("opus/48000")!==-1){var opusPayload=extractSdp(sdpLines[i],/:(\d+) opus\/48000/i);break}for(var i=0;i<sdpLines.length;i++)if(sdpLines[i].search("a=fmtp")!==-1){var payload=extractSdp(sdpLines[i],/a=fmtp:(\d+)/);if(payload===opusPayload){fmtpLineIndex=i;break}}return null===fmtpLineIndex?sdp:(sdpLines[fmtpLineIndex]=sdpLines[fmtpLineIndex].concat("; stereo=1; sprop-stereo=1"),sdp=sdpLines.join("\r\n"))}return{removeVPX:removeVPX,disableNACK:disableNACK,prioritize:prioritize,removeNonG722:removeNonG722,setApplicationSpecificBandwidth:function(sdp,bandwidth,isScreen){return setBAS(sdp,bandwidth,isScreen)},setVideoBitrates:function(sdp,params){return setVideoBitrates(sdp,params)},setOpusAttributes:function(sdp,params){return setOpusAttributes(sdp,params)},preferVP9:function(sdp){return preferCodec(sdp,"vp9")},preferCodec:preferCodec,forceStereoAudio:forceStereoAudio}}();window.BandwidthHandler=CodecsHandler;var OnIceCandidateHandler=function(){function processCandidates(connection,icePair){var candidate=icePair.candidate,iceRestrictions=connection.candidates,stun=iceRestrictions.stun,turn=iceRestrictions.turn;if(isNull(iceRestrictions.reflexive)||(stun=iceRestrictions.reflexive),isNull(iceRestrictions.relay)||(turn=iceRestrictions.relay),(iceRestrictions.host||!candidate.match(/typ host/g))&&(turn||!candidate.match(/typ relay/g))&&(stun||!candidate.match(/typ srflx/g))){var protocol=connection.iceProtocols;if((protocol.udp||!candidate.match(/ udp /g))&&(protocol.tcp||!candidate.match(/ tcp /g)))return connection.enableLogs&&console.debug("Your candidate pairs:",candidate),{candidate:candidate,sdpMid:icePair.sdpMid,sdpMLineIndex:icePair.sdpMLineIndex}}}return{processCandidates:processCandidates}}(),IceServersHandler=function(){function getIceServers(connection){var iceServers=[{urls:["stun:stun.l.google.com:19302","stun:stun1.l.google.com:19302","stun:stun2.l.google.com:19302","stun:stun.l.google.com:19302?transport=udp"]}];return iceServers}return{getIceServers:getIceServers}}();window.currentUserMediaRequest={streams:[],mutex:!1,queueRequests:[],remove:function(idInstance){this.mutex=!1;var stream=this.streams[idInstance];if(stream){stream=stream.stream;var options=stream.currentUserMediaRequestOptions;this.queueRequests.indexOf(options)&&(delete this.queueRequests[this.queueRequests.indexOf(options)],this.queueRequests=removeNullEntries(this.queueRequests)),this.streams[idInstance].stream=null,delete this.streams[idInstance]}}};var StreamsHandler=function(){function handleType(type){if(type)return"string"==typeof type||"undefined"==typeof type?type:type.audio&&type.video?null:type.audio?"audio":type.video?"video":void 0}function setHandlers(stream,syncAction,connection){function graduallyIncreaseVolume(){if(connection.streamEvents[stream.streamid].mediaElement){var mediaElement=connection.streamEvents[stream.streamid].mediaElement;mediaElement.volume=0,afterEach(200,5,function(){try{mediaElement.volume+=.2}catch(e){mediaElement.volume=1}})}}if(stream&&stream.addEventListener){if("undefined"==typeof syncAction||1==syncAction){var streamEndedEvent="ended";"oninactive"in stream&&(streamEndedEvent="inactive"),stream.addEventListener(streamEndedEvent,function(){StreamsHandler.onSyncNeeded(this.streamid,streamEndedEvent)},!1)}stream.mute=function(type,isSyncAction){type=handleType(type),"undefined"!=typeof isSyncAction&&(syncAction=isSyncAction),"undefined"!=typeof type&&"audio"!=type||getTracks(stream,"audio").forEach(function(track){track.enabled=!1,connection.streamEvents[stream.streamid].isAudioMuted=!0}),"undefined"!=typeof type&&"video"!=type||getTracks(stream,"video").forEach(function(track){track.enabled=!1}),"undefined"!=typeof syncAction&&1!=syncAction||StreamsHandler.onSyncNeeded(stream.streamid,"mute",type),connection.streamEvents[stream.streamid].muteType=type||"both",fireEvent(stream,"mute",type)},stream.unmute=function(type,isSyncAction){type=handleType(type),"undefined"!=typeof isSyncAction&&(syncAction=isSyncAction),graduallyIncreaseVolume(),"undefined"!=typeof type&&"audio"!=type||getTracks(stream,"audio").forEach(function(track){track.enabled=!0,connection.streamEvents[stream.streamid].isAudioMuted=!1}),"undefined"!=typeof type&&"video"!=type||(getTracks(stream,"video").forEach(function(track){track.enabled=!0}),"undefined"!=typeof type&&"video"==type&&connection.streamEvents[stream.streamid].isAudioMuted&&!function looper(times){times||(times=0),times++,times<100&&connection.streamEvents[stream.streamid].isAudioMuted&&(stream.mute("audio"),setTimeout(function(){looper(times)},50))}()),"undefined"!=typeof syncAction&&1!=syncAction||StreamsHandler.onSyncNeeded(stream.streamid,"unmute",type),connection.streamEvents[stream.streamid].unmuteType=type||"both",fireEvent(stream,"unmute",type)}}}function afterEach(setTimeoutInteval,numberOfTimes,callback,startedTimes){startedTimes=(startedTimes||0)+1,startedTimes>=numberOfTimes||setTimeout(function(){callback(),afterEach(setTimeoutInteval,numberOfTimes,callback,startedTimes)},setTimeoutInteval)}return{setHandlers:setHandlers,onSyncNeeded:function(streamid,action,type){}}}(),TextSender={send:function(config){function sendText(textMessage,text){var data={type:"text",uuid:uuid,sendingTime:sendingTime};textMessage&&(text=textMessage,data.packets=parseInt(text.length/packetSize)),text.length>packetSize?data.message=text.slice(0,packetSize):(data.message=text,data.last=!0,data.isobject=isobject),channel.send(data,remoteUserId),textToTransfer=text.slice(data.message.length),textToTransfer.length&&setTimeout(function(){sendText(null,textToTransfer)},connection.chunkInterval||100)}var connection=config.connection,channel=config.channel,remoteUserId=config.remoteUserId,initialText=config.text,packetSize=connection.chunkSize||1e3,textToTransfer="",isobject=!1;isString(initialText)||(isobject=!0,initialText=JSON.stringify(initialText));var uuid=getRandomString(),sendingTime=(new Date).getTime();sendText(initialText)}},FileProgressBarHandler=function(){function handle(connection){function updateLabel(progress,label){if(progress.position!==-1){var position=+progress.position.toFixed(2).split(".")[1]||100;label.innerHTML=position+"%"}}var progressHelper={};connection.onFileStart=function(file){var div=document.createElement("div");return div.title=file.name,div.innerHTML="<label>0%</label> <progress></progress>",file.remoteUserId&&(div.innerHTML+=" (Sharing with:"+file.remoteUserId+")"),connection.filesContainer||(connection.filesContainer=document.body||document.documentElement),connection.filesContainer.insertBefore(div,connection.filesContainer.firstChild),file.remoteUserId?(progressHelper[file.uuid]||(progressHelper[file.uuid]={}),progressHelper[file.uuid][file.remoteUserId]={div:div,progress:div.querySelector("progress"),label:div.querySelector("label")},void(progressHelper[file.uuid][file.remoteUserId].progress.max=file.maxChunks)):(progressHelper[file.uuid]={div:div,progress:div.querySelector("progress"),label:div.querySelector("label")},void(progressHelper[file.uuid].progress.max=file.maxChunks))},connection.onFileProgress=function(chunk){var helper=progressHelper[chunk.uuid];helper&&(chunk.remoteUserId&&!(helper=progressHelper[chunk.uuid][chunk.remoteUserId])||(helper.progress.value=chunk.currentPosition||chunk.maxChunks||helper.progress.max,updateLabel(helper.progress,helper.label)))},connection.onFileEnd=function(file){var helper=progressHelper[file.uuid];if(!helper)return void console.error("No such progress-helper element exist.",file);if(!file.remoteUserId||(helper=progressHelper[file.uuid][file.remoteUserId])){var div=helper.div;file.type.indexOf("image")!=-1?div.innerHTML='<a href="'+file.url+'" download="'+file.name+'">Download <strong style="color:red;">'+file.name+'</strong> </a><br /><img src="'+file.url+'" title="'+file.name+'" style="max-width: 80%;">':div.innerHTML='<a href="'+file.url+'" download="'+file.name+'">Download <strong style="color:red;">'+file.name+'</strong> </a><br /><iframe src="'+file.url+'" title="'+file.name+'" style="width: 80%;border: 0;height: inherit;margin-top:1em;"></iframe>'}}}return{handle:handle}}(),TranslationHandler=function(){function handle(connection){connection.autoTranslateText=!1,connection.language="en",connection.googKey="AIzaSyCgB5hmFY74WYB-EoWkhr9cAGr6TiTHrEE",connection.Translator={TranslateText:function(text,callback){var newScript=document.createElement("script");newScript.type="text/javascript";var sourceText=encodeURIComponent(text),randomNumber="method"+connection.token();window[randomNumber]=function(response){return response.data&&response.data.translations[0]&&callback?void callback(response.data.translations[0].translatedText):response.error&&"Daily Limit Exceeded"===response.error.message?void console.error('Text translation failed. Error message: "Daily Limit Exceeded."'):response.error?void console.error(response.error.message):void console.error(response)};var source="https://www.googleapis.com/language/translate/v2?key="+connection.googKey+"&target="+(connection.language||"en-US")+"&callback=window."+randomNumber+"&q="+sourceText;newScript.src=source,document.getElementsByTagName("head")[0].appendChild(newScript)},getListOfLanguages:function(callback){var xhr=new XMLHttpRequest;xhr.onreadystatechange=function(){if(xhr.readyState==XMLHttpRequest.DONE){var response=JSON.parse(xhr.responseText);if(response&&response.data&&response.data.languages)return void callback(response.data.languages);if(response.error&&"Daily Limit Exceeded"===response.error.message)return void console.error('Text translation failed. Error message: "Daily Limit Exceeded."');if(response.error)return void console.error(response.error.message);console.error(response)}};var url="https://www.googleapis.com/language/translate/v2/languages?key="+connection.googKey+"&target=en";xhr.open("GET",url,!0),xhr.send(null)}}}return{handle:handle}}();!function(connection){function onUserLeft(remoteUserId){connection.deletePeer(remoteUserId)}function connectSocket(connectCallback){if(connection.socketAutoReConnect=!0,connection.socket)return void(connectCallback&&connectCallback(connection.socket));if("undefined"==typeof SocketConnection)if("undefined"!=typeof FirebaseConnection)window.SocketConnection=FirebaseConnection;else{if("undefined"==typeof PubNubConnection)throw"SocketConnection.js seems missed.";window.SocketConnection=PubNubConnection}new SocketConnection(connection,function(s){connectCallback&&connectCallback(connection.socket)})}function joinRoom(connectionDescription,cb){connection.socket.emit("join-room",{sessionid:connection.sessionid,session:connection.session,mediaConstraints:connection.mediaConstraints,sdpConstraints:connection.sdpConstraints,streams:getStreamInfoForAdmin(),extra:connection.extra,password:"undefined"!=typeof connection.password&&"object"!=typeof connection.password?connection.password:""},function(isRoomJoined,error){if(isRoomJoined===!0){if(connection.enableLogs&&console.log("isRoomJoined: ",isRoomJoined," roomid: ",connection.sessionid),connection.peers[connection.sessionid])return;mPeer.onNegotiationNeeded(connectionDescription)}isRoomJoined===!1&&connection.enableLogs&&console.warn("isRoomJoined: ",error," roomid: ",connection.sessionid),cb(isRoomJoined,connection.sessionid,error)})}function openRoom(callback){connection.enableLogs&&console.log("Sending open-room signal to socket.io"),connection.waitingForLocalMedia=!1,connection.socket.emit("open-room",{sessionid:connection.sessionid,session:connection.session,mediaConstraints:connection.mediaConstraints,sdpConstraints:connection.sdpConstraints,streams:getStreamInfoForAdmin(),extra:connection.extra,identifier:connection.publicRoomIdentifier,password:"undefined"!=typeof connection.password&&"object"!=typeof connection.password?connection.password:""},function(isRoomOpened,error){isRoomOpened===!0&&(connection.enableLogs&&console.log("isRoomOpened: ",isRoomOpened," roomid: ",connection.sessionid),callback(isRoomOpened,connection.sessionid)),isRoomOpened===!1&&(connection.enableLogs&&console.warn("isRoomOpened: ",error," roomid: ",connection.sessionid),callback(isRoomOpened,connection.sessionid,error))})}function getStreamInfoForAdmin(){try{return connection.streamEvents.selectAll("local").map(function(event){return{streamid:event.streamid,tracks:event.stream.getTracks().length}})}catch(e){return[]}}function beforeJoin(userPreferences,callback){if(connection.dontCaptureUserMedia||userPreferences.isDataOnly)return void callback();var localMediaConstraints={};userPreferences.localPeerSdpConstraints.OfferToReceiveAudio&&(localMediaConstraints.audio=connection.mediaConstraints.audio),userPreferences.localPeerSdpConstraints.OfferToReceiveVideo&&(localMediaConstraints.video=connection.mediaConstraints.video);var session=userPreferences.session||connection.session;return session.oneway&&"two-way"!==session.audio&&"two-way"!==session.video&&"two-way"!==session.screen?void callback():(session.oneway&&session.audio&&"two-way"===session.audio&&(session={audio:!0}),void((session.audio||session.video||session.screen)&&(session.screen?"Edge"===DetectRTC.browser.name?navigator.getDisplayMedia({video:!0,audio:isAudioPlusTab(connection)}).then(function(screen){screen.isScreen=!0,mPeer.onGettingLocalMedia(screen),!session.audio&&!session.video||isAudioPlusTab(connection)?callback(screen):connection.invokeGetUserMedia(null,callback)},function(error){console.error("Unable to capture screen on Edge. HTTPs and version 17+ is required.")}):connection.invokeGetUserMedia({audio:isAudioPlusTab(connection),video:!0,isScreen:!0},!session.audio&&!session.video||isAudioPlusTab(connection)?callback:connection.invokeGetUserMedia(null,callback)):(session.audio||session.video)&&connection.invokeGetUserMedia(null,callback,session))))}function applyConstraints(stream,mediaConstraints){return stream?(mediaConstraints.audio&&getTracks(stream,"audio").forEach(function(track){track.applyConstraints(mediaConstraints.audio)}),void(mediaConstraints.video&&getTracks(stream,"video").forEach(function(track){track.applyConstraints(mediaConstraints.video)}))):void(connection.enableLogs&&console.error("No stream to applyConstraints."))}function replaceTrack(track,remoteUserId,isVideoTrack){return remoteUserId?void mPeer.replaceTrack(track,remoteUserId,isVideoTrack):void connection.peers.getAllParticipants().forEach(function(participant){mPeer.replaceTrack(track,participant,isVideoTrack)})}forceOptions=forceOptions||{useDefaultDevices:!0},connection.channel=connection.sessionid=(roomid||location.href.replace(/\/|:|#|\?|\$|\^|%|\.|`|~|!|\+|@|\[|\||]|\|*. /g,"").split("\n").join("").split("\r").join(""))+"";var mPeer=new MultiPeers(connection),preventDuplicateOnStreamEvents={};mPeer.onGettingLocalMedia=function(stream,callback){if(callback=callback||function(){},preventDuplicateOnStreamEvents[stream.streamid])return void callback();preventDuplicateOnStreamEvents[stream.streamid]=!0;try{stream.type="local"}catch(e){}connection.setStreamEndHandler(stream),getRMCMediaElement(stream,function(mediaElement){mediaElement.id=stream.streamid,mediaElement.muted=!0,mediaElement.volume=0,connection.attachStreams.indexOf(stream)===-1&&connection.attachStreams.push(stream),"undefined"!=typeof StreamsHandler&&StreamsHandler.setHandlers(stream,!0,connection);var isAudioMuted=0===stream.getAudioTracks().filter(function(track){return track.enabled}).length;connection.streamEvents[stream.streamid]={stream:stream,type:"local",mediaElement:mediaElement,userid:connection.userid,extra:connection.extra,streamid:stream.streamid,isAudioMuted:isAudioMuted};try{setHarkEvents(connection,connection.streamEvents[stream.streamid]),setMuteHandlers(connection,connection.streamEvents[stream.streamid]),connection.onstream(connection.streamEvents[stream.streamid])}catch(e){}callback()},connection)},mPeer.onGettingRemoteMedia=function(stream,remoteUserId){try{stream.type="remote"}catch(e){}connection.setStreamEndHandler(stream,"remote-stream"),getRMCMediaElement(stream,function(mediaElement){mediaElement.id=stream.streamid,"undefined"!=typeof StreamsHandler&&StreamsHandler.setHandlers(stream,!1,connection),connection.streamEvents[stream.streamid]={stream:stream,type:"remote",userid:remoteUserId,extra:connection.peers[remoteUserId]?connection.peers[remoteUserId].extra:{},mediaElement:mediaElement,streamid:stream.streamid},setMuteHandlers(connection,connection.streamEvents[stream.streamid]),connection.onstream(connection.streamEvents[stream.streamid])},connection)},mPeer.onRemovingRemoteMedia=function(stream,remoteUserId){var streamEvent=connection.streamEvents[stream.streamid];streamEvent||(streamEvent={stream:stream,type:"remote",userid:remoteUserId,extra:connection.peers[remoteUserId]?connection.peers[remoteUserId].extra:{},streamid:stream.streamid,mediaElement:connection.streamEvents[stream.streamid]?connection.streamEvents[stream.streamid].mediaElement:null}),connection.peersBackup[streamEvent.userid]&&(streamEvent.extra=connection.peersBackup[streamEvent.userid].extra),connection.onstreamended(streamEvent),delete connection.streamEvents[stream.streamid]},mPeer.onNegotiationNeeded=function(message,remoteUserId,callback){callback=callback||function(){},remoteUserId=remoteUserId||message.remoteUserId,message=message||"";var messageToDeliver={remoteUserId:remoteUserId,message:message,sender:connection.userid};message.remoteUserId&&message.message&&message.sender&&(messageToDeliver=message),connectSocket(function(){connection.socket.emit(connection.socketMessageEvent,messageToDeliver,callback)})},mPeer.onUserLeft=onUserLeft,mPeer.disconnectWith=function(remoteUserId,callback){connection.socket&&connection.socket.emit("disconnect-with",remoteUserId,callback||function(){}),connection.deletePeer(remoteUserId)},connection.socketOptions={transport:"polling"},connection.openOrJoin=function(roomid,callback){callback=callback||function(){},connection.checkPresence(roomid,function(isRoomExist,roomid){if(isRoomExist){connection.sessionid=roomid;var localPeerSdpConstraints=!1,remotePeerSdpConstraints=!1,isOneWay=!!connection.session.oneway,isDataOnly=isData(connection.session);remotePeerSdpConstraints={OfferToReceiveAudio:connection.sdpConstraints.mandatory.OfferToReceiveAudio,OfferToReceiveVideo:connection.sdpConstraints.mandatory.OfferToReceiveVideo},localPeerSdpConstraints={OfferToReceiveAudio:isOneWay?!!connection.session.audio:connection.sdpConstraints.mandatory.OfferToReceiveAudio,OfferToReceiveVideo:isOneWay?!!connection.session.video||!!connection.session.screen:connection.sdpConstraints.mandatory.OfferToReceiveVideo};var connectionDescription={remoteUserId:connection.sessionid,message:{newParticipationRequest:!0,isOneWay:isOneWay,isDataOnly:isDataOnly,localPeerSdpConstraints:localPeerSdpConstraints,remotePeerSdpConstraints:remotePeerSdpConstraints},sender:connection.userid};return void beforeJoin(connectionDescription.message,function(){joinRoom(connectionDescription,callback)})}return connection.waitingForLocalMedia=!0,connection.isInitiator=!0,connection.sessionid=roomid||connection.sessionid,isData(connection.session)?void openRoom(callback):void connection.captureUserMedia(function(){openRoom(callback)})})},connection.waitingForLocalMedia=!1,connection.open=function(roomid,callback){callback=callback||function(){},connection.waitingForLocalMedia=!0,connection.isInitiator=!0,connection.sessionid=roomid||connection.sessionid,connectSocket(function(){return isData(connection.session)?void openRoom(callback):void connection.captureUserMedia(function(){openRoom(callback)})})},connection.peersBackup={},connection.deletePeer=function(remoteUserId){if(remoteUserId&&connection.peers[remoteUserId]){var eventObject={userid:remoteUserId,extra:connection.peers[remoteUserId]?connection.peers[remoteUserId].extra:{}};if(connection.peersBackup[eventObject.userid]&&(eventObject.extra=connection.peersBackup[eventObject.userid].extra),connection.onleave(eventObject),connection.peers[remoteUserId]){connection.peers[remoteUserId].streams.forEach(function(stream){stream.stop()});var peer=connection.peers[remoteUserId].peer;if(peer&&"closed"!==peer.iceConnectionState)try{peer.close()}catch(e){}connection.peers[remoteUserId]&&(connection.peers[remoteUserId].peer=null,delete connection.peers[remoteUserId])}}},connection.rejoin=function(connectionDescription){if(!connection.isInitiator&&connectionDescription&&Object.keys(connectionDescription).length){var extra={};connection.peers[connectionDescription.remoteUserId]&&(extra=connection.peers[connectionDescription.remoteUserId].extra,connection.deletePeer(connectionDescription.remoteUserId)),connectionDescription&&connectionDescription.remoteUserId&&(connection.join(connectionDescription.remoteUserId),connection.onReConnecting({userid:connectionDescription.remoteUserId,extra:extra}))}},connection.join=function(remoteUserId,options){connection.sessionid=!!remoteUserId&&(remoteUserId.sessionid||remoteUserId.remoteUserId||remoteUserId)||connection.sessionid,connection.sessionid+="";var localPeerSdpConstraints=!1,remotePeerSdpConstraints=!1,isOneWay=!1,isDataOnly=!1;if(remoteUserId&&remoteUserId.session||!remoteUserId||"string"==typeof remoteUserId){var session=remoteUserId?remoteUserId.session||connection.session:connection.session;isOneWay=!!session.oneway,isDataOnly=isData(session),remotePeerSdpConstraints={OfferToReceiveAudio:connection.sdpConstraints.mandatory.OfferToReceiveAudio,OfferToReceiveVideo:connection.sdpConstraints.mandatory.OfferToReceiveVideo},localPeerSdpConstraints={OfferToReceiveAudio:isOneWay?!!connection.session.audio:connection.sdpConstraints.mandatory.OfferToReceiveAudio,OfferToReceiveVideo:isOneWay?!!connection.session.video||!!connection.session.screen:connection.sdpConstraints.mandatory.OfferToReceiveVideo}}options=options||{};var cb=function(){};"function"==typeof options&&(cb=options,options={}),"undefined"!=typeof options.localPeerSdpConstraints&&(localPeerSdpConstraints=options.localPeerSdpConstraints),"undefined"!=typeof options.remotePeerSdpConstraints&&(remotePeerSdpConstraints=options.remotePeerSdpConstraints),"undefined"!=typeof options.isOneWay&&(isOneWay=options.isOneWay),"undefined"!=typeof options.isDataOnly&&(isDataOnly=options.isDataOnly);var connectionDescription={remoteUserId:connection.sessionid,message:{newParticipationRequest:!0,isOneWay:isOneWay,isDataOnly:isDataOnly,localPeerSdpConstraints:localPeerSdpConstraints,remotePeerSdpConstraints:remotePeerSdpConstraints},sender:connection.userid};return beforeJoin(connectionDescription.message,function(){connectSocket(function(){joinRoom(connectionDescription,cb)})}),connectionDescription},connection.publicRoomIdentifier="",connection.getUserMedia=connection.captureUserMedia=function(callback,sessionForced){callback=callback||function(){};var session=sessionForced||connection.session;return connection.dontCaptureUserMedia||isData(session)?void callback():void((session.audio||session.video||session.screen)&&(session.screen?"Edge"===DetectRTC.browser.name?navigator.getDisplayMedia({video:!0,audio:isAudioPlusTab(connection)}).then(function(screen){if(screen.isScreen=!0,mPeer.onGettingLocalMedia(screen),(session.audio||session.video)&&!isAudioPlusTab(connection)){var nonScreenSession={};for(var s in session)"screen"!==s&&(nonScreenSession[s]=session[s]);return void connection.invokeGetUserMedia(sessionForced,callback,nonScreenSession)}callback(screen)},function(error){console.error("Unable to capture screen on Edge. HTTPs and version 17+ is required.")}):connection.invokeGetUserMedia({audio:isAudioPlusTab(connection),video:!0,isScreen:!0},function(stream){if((session.audio||session.video)&&!isAudioPlusTab(connection)){var nonScreenSession={};for(var s in session)"screen"!==s&&(nonScreenSession[s]=session[s]);return void connection.invokeGetUserMedia(sessionForced,callback,nonScreenSession)}callback(stream)}):(session.audio||session.video)&&connection.invokeGetUserMedia(sessionForced,callback,session)))},connection.onbeforeunload=function(arg1,dontCloseSocket){connection.closeBeforeUnload&&(connection.peers.getAllParticipants().forEach(function(participant){mPeer.onNegotiationNeeded({userLeft:!0},participant),connection.peers[participant]&&connection.peers[participant].peer&&connection.peers[participant].peer.close(),delete connection.peers[participant]}),dontCloseSocket||connection.closeSocket(),
-connection.isInitiator=!1)},window.ignoreBeforeUnload?connection.closeBeforeUnload=!1:(connection.closeBeforeUnload=!0,window.addEventListener("beforeunload",connection.onbeforeunload,!1)),connection.userid=getRandomString(),connection.changeUserId=function(newUserId,callback){callback=callback||function(){},connection.userid=newUserId||getRandomString(),connection.socket.emit("changed-uuid",connection.userid,callback)},connection.extra={},connection.attachStreams=[],connection.session={audio:!0,video:!0},connection.enableFileSharing=!1,connection.bandwidth={screen:!1,audio:!1,video:!1},connection.codecs={audio:"opus",video:"VP9"},connection.processSdp=function(sdp){return isUnifiedPlanSupportedDefault()?sdp:"Safari"===DetectRTC.browser.name?sdp:("VP8"===connection.codecs.video.toUpperCase()&&(sdp=CodecsHandler.preferCodec(sdp,"vp8")),"VP9"===connection.codecs.video.toUpperCase()&&(sdp=CodecsHandler.preferCodec(sdp,"vp9")),"H264"===connection.codecs.video.toUpperCase()&&(sdp=CodecsHandler.preferCodec(sdp,"h264")),"G722"===connection.codecs.audio&&(sdp=CodecsHandler.removeNonG722(sdp)),"Firefox"===DetectRTC.browser.name?sdp:((connection.bandwidth.video||connection.bandwidth.screen)&&(sdp=CodecsHandler.setApplicationSpecificBandwidth(sdp,connection.bandwidth,!!connection.session.screen)),connection.bandwidth.video&&(sdp=CodecsHandler.setVideoBitrates(sdp,{min:8*connection.bandwidth.video*1024,max:8*connection.bandwidth.video*1024})),connection.bandwidth.audio&&(sdp=CodecsHandler.setOpusAttributes(sdp,{maxaveragebitrate:8*connection.bandwidth.audio*1024,maxplaybackrate:8*connection.bandwidth.audio*1024,stereo:1,maxptime:3})),sdp))},"undefined"!=typeof CodecsHandler&&(connection.BandwidthHandler=connection.CodecsHandler=CodecsHandler),connection.mediaConstraints={audio:{mandatory:{},optional:connection.bandwidth.audio?[{bandwidth:8*connection.bandwidth.audio*1024||1048576}]:[]},video:{mandatory:{},optional:connection.bandwidth.video?[{bandwidth:8*connection.bandwidth.video*1024||1048576},{facingMode:"user"}]:[{facingMode:"user"}]}},"Firefox"===DetectRTC.browser.name&&(connection.mediaConstraints={audio:!0,video:!0}),forceOptions.useDefaultDevices||DetectRTC.isMobileDevice||DetectRTC.load(function(){var lastAudioDevice,lastVideoDevice;if(DetectRTC.MediaDevices.forEach(function(device){"audioinput"===device.kind&&connection.mediaConstraints.audio!==!1&&(lastAudioDevice=device),"videoinput"===device.kind&&connection.mediaConstraints.video!==!1&&(lastVideoDevice=device)}),lastAudioDevice){if("Firefox"===DetectRTC.browser.name)return void(connection.mediaConstraints.audio!==!0?connection.mediaConstraints.audio.deviceId=lastAudioDevice.id:connection.mediaConstraints.audio={deviceId:lastAudioDevice.id});1==connection.mediaConstraints.audio&&(connection.mediaConstraints.audio={mandatory:{},optional:[]}),connection.mediaConstraints.audio.optional||(connection.mediaConstraints.audio.optional=[]);var optional=[{sourceId:lastAudioDevice.id}];connection.mediaConstraints.audio.optional=optional.concat(connection.mediaConstraints.audio.optional)}if(lastVideoDevice){if("Firefox"===DetectRTC.browser.name)return void(connection.mediaConstraints.video!==!0?connection.mediaConstraints.video.deviceId=lastVideoDevice.id:connection.mediaConstraints.video={deviceId:lastVideoDevice.id});1==connection.mediaConstraints.video&&(connection.mediaConstraints.video={mandatory:{},optional:[]}),connection.mediaConstraints.video.optional||(connection.mediaConstraints.video.optional=[]);var optional=[{sourceId:lastVideoDevice.id}];connection.mediaConstraints.video.optional=optional.concat(connection.mediaConstraints.video.optional)}}),connection.sdpConstraints={mandatory:{OfferToReceiveAudio:!0,OfferToReceiveVideo:!0},optional:[{VoiceActivityDetection:!1}]},connection.sdpSemantics=null,connection.iceCandidatePoolSize=null,connection.bundlePolicy=null,connection.rtcpMuxPolicy=null,connection.iceTransportPolicy=null,connection.optionalArgument={optional:[{DtlsSrtpKeyAgreement:!0},{googImprovedWifiBwe:!0},{googScreencastMinBitrate:300},{googIPv6:!0},{googDscp:!0},{googCpuUnderuseThreshold:55},{googCpuOveruseThreshold:85},{googSuspendBelowMinBitrate:!0},{googCpuOveruseDetection:!0}],mandatory:{}},connection.iceServers=IceServersHandler.getIceServers(connection),connection.candidates={host:!0,stun:!0,turn:!0},connection.iceProtocols={tcp:!0,udp:!0},connection.onopen=function(event){connection.enableLogs&&console.info("Data connection has been opened between you & ",event.userid)},connection.onclose=function(event){connection.enableLogs&&console.warn("Data connection has been closed between you & ",event.userid)},connection.onerror=function(error){connection.enableLogs&&console.error(error.userid,"data-error",error)},connection.onmessage=function(event){connection.enableLogs&&console.debug("data-message",event.userid,event.data)},connection.send=function(data,remoteUserId){connection.peers.send(data,remoteUserId)},connection.close=connection.disconnect=connection.leave=function(){connection.onbeforeunload(!1,!0)},connection.closeEntireSession=function(callback){callback=callback||function(){},connection.socket.emit("close-entire-session",function looper(){return connection.getAllParticipants().length?void setTimeout(looper,100):(connection.onEntireSessionClosed({sessionid:connection.sessionid,userid:connection.userid,extra:connection.extra}),void connection.changeUserId(null,function(){connection.close(),callback()}))})},connection.onEntireSessionClosed=function(event){connection.enableLogs&&console.info("Entire session is closed: ",event.sessionid,event.extra)},connection.onstream=function(e){var parentNode=connection.videosContainer;parentNode.insertBefore(e.mediaElement,parentNode.firstChild);var played=e.mediaElement.play();return"undefined"!=typeof played?void played["catch"](function(){}).then(function(){setTimeout(function(){e.mediaElement.play()},2e3)}):void setTimeout(function(){e.mediaElement.play()},2e3)},connection.onstreamended=function(e){e.mediaElement||(e.mediaElement=document.getElementById(e.streamid)),e.mediaElement&&e.mediaElement.parentNode&&e.mediaElement.parentNode.removeChild(e.mediaElement)},connection.direction="many-to-many",connection.removeStream=function(streamid,remoteUserId){var stream;return connection.attachStreams.forEach(function(localStream){localStream.id===streamid&&(stream=localStream)}),stream?(connection.peers.getAllParticipants().forEach(function(participant){if(!remoteUserId||participant===remoteUserId){var user=connection.peers[participant];try{user.peer.removeStream(stream)}catch(e){}}}),void connection.renegotiate()):void console.warn("No such stream exist.",streamid)},connection.addStream=function(session,remoteUserId){function gumCallback(stream){session.streamCallback&&session.streamCallback(stream),connection.renegotiate(remoteUserId)}return session.getTracks?(connection.attachStreams.indexOf(session)===-1&&(session.streamid||(session.streamid=session.id),connection.attachStreams.push(session)),void connection.renegotiate(remoteUserId)):isData(session)?void connection.renegotiate(remoteUserId):void((session.audio||session.video||session.screen)&&(session.screen?"Edge"===DetectRTC.browser.name?navigator.getDisplayMedia({video:!0,audio:isAudioPlusTab(connection)}).then(function(screen){screen.isScreen=!0,mPeer.onGettingLocalMedia(screen),!session.audio&&!session.video||isAudioPlusTab(connection)?gumCallback(screen):connection.invokeGetUserMedia(null,function(stream){gumCallback(stream)})},function(error){console.error("Unable to capture screen on Edge. HTTPs and version 17+ is required.")}):connection.invokeGetUserMedia({audio:isAudioPlusTab(connection),video:!0,isScreen:!0},function(stream){!session.audio&&!session.video||isAudioPlusTab(connection)?gumCallback(stream):connection.invokeGetUserMedia(null,function(stream){gumCallback(stream)})}):(session.audio||session.video)&&connection.invokeGetUserMedia(null,gumCallback)))},connection.invokeGetUserMedia=function(localMediaConstraints,callback,session){session||(session=connection.session),localMediaConstraints||(localMediaConstraints=connection.mediaConstraints),getUserMediaHandler({onGettingLocalMedia:function(stream){var videoConstraints=localMediaConstraints.video;videoConstraints&&(videoConstraints.mediaSource||videoConstraints.mozMediaSource?stream.isScreen=!0:videoConstraints.mandatory&&videoConstraints.mandatory.chromeMediaSource&&(stream.isScreen=!0)),stream.isScreen||(stream.isVideo=!!getTracks(stream,"video").length,stream.isAudio=!stream.isVideo&&getTracks(stream,"audio").length),mPeer.onGettingLocalMedia(stream,function(){"function"==typeof callback&&callback(stream)})},onLocalMediaError:function(error,constraints){mPeer.onLocalMediaError(error,constraints)},localMediaConstraints:localMediaConstraints||{audio:!!session.audio&&localMediaConstraints.audio,video:!!session.video&&localMediaConstraints.video}})},connection.applyConstraints=function(mediaConstraints,streamid){if(!MediaStreamTrack||!MediaStreamTrack.prototype.applyConstraints)return void alert("track.applyConstraints is NOT supported in your browser.");if(streamid){var stream;return connection.streamEvents[streamid]&&(stream=connection.streamEvents[streamid].stream),void applyConstraints(stream,mediaConstraints)}connection.attachStreams.forEach(function(stream){applyConstraints(stream,mediaConstraints)})},connection.replaceTrack=function(session,remoteUserId,isVideoTrack){function gumCallback(stream){connection.replaceTrack(stream,remoteUserId,isVideoTrack||session.video||session.screen)}if(session=session||{},!RTCPeerConnection.prototype.getSenders)return void connection.addStream(session);if(session instanceof MediaStreamTrack)return void replaceTrack(session,remoteUserId,isVideoTrack);if(session instanceof MediaStream)return getTracks(session,"video").length&&replaceTrack(getTracks(session,"video")[0],remoteUserId,!0),void(getTracks(session,"audio").length&&replaceTrack(getTracks(session,"audio")[0],remoteUserId,!1));if(isData(session))throw"connection.replaceTrack requires audio and/or video and/or screen.";(session.audio||session.video||session.screen)&&(session.screen?"Edge"===DetectRTC.browser.name?navigator.getDisplayMedia({video:!0,audio:isAudioPlusTab(connection)}).then(function(screen){screen.isScreen=!0,mPeer.onGettingLocalMedia(screen),!session.audio&&!session.video||isAudioPlusTab(connection)?gumCallback(screen):connection.invokeGetUserMedia(null,gumCallback)},function(error){console.error("Unable to capture screen on Edge. HTTPs and version 17+ is required.")}):connection.invokeGetUserMedia({audio:isAudioPlusTab(connection),video:!0,isScreen:!0},!session.audio&&!session.video||isAudioPlusTab(connection)?gumCallback:connection.invokeGetUserMedia(null,gumCallback)):(session.audio||session.video)&&connection.invokeGetUserMedia(null,gumCallback))},connection.resetTrack=function(remoteUsersIds,isVideoTrack){remoteUsersIds||(remoteUsersIds=connection.getAllParticipants()),"string"==typeof remoteUsersIds&&(remoteUsersIds=[remoteUsersIds]),remoteUsersIds.forEach(function(participant){var peer=connection.peers[participant].peer;"undefined"!=typeof isVideoTrack&&isVideoTrack!==!0||!peer.lastVideoTrack||connection.replaceTrack(peer.lastVideoTrack,participant,!0),"undefined"!=typeof isVideoTrack&&isVideoTrack!==!1||!peer.lastAudioTrack||connection.replaceTrack(peer.lastAudioTrack,participant,!1)})},connection.renegotiate=function(remoteUserId){return remoteUserId?void mPeer.renegotiatePeer(remoteUserId):void connection.peers.getAllParticipants().forEach(function(participant){mPeer.renegotiatePeer(participant)})},connection.setStreamEndHandler=function(stream,isRemote){if(stream&&stream.addEventListener&&(isRemote=!!isRemote,!stream.alreadySetEndHandler)){stream.alreadySetEndHandler=!0;var streamEndedEvent="ended";"oninactive"in stream&&(streamEndedEvent="inactive"),stream.addEventListener(streamEndedEvent,function(){if(stream.idInstance&&currentUserMediaRequest.remove(stream.idInstance),!isRemote){var streams=[];connection.attachStreams.forEach(function(s){s.id!=stream.id&&streams.push(s)}),connection.attachStreams=streams}var streamEvent=connection.streamEvents[stream.streamid];if(streamEvent||(streamEvent={stream:stream,streamid:stream.streamid,type:isRemote?"remote":"local",userid:connection.userid,extra:connection.extra,mediaElement:connection.streamEvents[stream.streamid]?connection.streamEvents[stream.streamid].mediaElement:null}),isRemote&&connection.peers[streamEvent.userid]){var peer=connection.peers[streamEvent.userid].peer,streams=[];peer.getRemoteStreams().forEach(function(s){s.id!=stream.id&&streams.push(s)}),connection.peers[streamEvent.userid].streams=streams}streamEvent.userid===connection.userid&&"remote"===streamEvent.type||(connection.peersBackup[streamEvent.userid]&&(streamEvent.extra=connection.peersBackup[streamEvent.userid].extra),connection.onstreamended(streamEvent),delete connection.streamEvents[stream.streamid])},!1)}},connection.onMediaError=function(error,constraints){connection.enableLogs&&console.error(error,constraints)},connection.autoCloseEntireSession=!1,connection.filesContainer=connection.videosContainer=document.body||document.documentElement,connection.isInitiator=!1,connection.shareFile=mPeer.shareFile,"undefined"!=typeof FileProgressBarHandler&&FileProgressBarHandler.handle(connection),"undefined"!=typeof TranslationHandler&&TranslationHandler.handle(connection),connection.token=getRandomString,connection.onNewParticipant=function(participantId,userPreferences){connection.acceptParticipationRequest(participantId,userPreferences)},connection.acceptParticipationRequest=function(participantId,userPreferences){userPreferences.successCallback&&(userPreferences.successCallback(),delete userPreferences.successCallback),mPeer.createNewPeer(participantId,userPreferences)},"undefined"!=typeof StreamsHandler&&(connection.StreamsHandler=StreamsHandler),connection.onleave=function(userid){},connection.invokeSelectFileDialog=function(callback){var selector=new FileSelector;selector.accept="*.*",selector.selectSingleFile(callback)},connection.onmute=function(e){if(e&&e.mediaElement)if("both"===e.muteType||"video"===e.muteType){e.mediaElement.src=null;var paused=e.mediaElement.pause();"undefined"!=typeof paused?paused.then(function(){e.mediaElement.poster=e.snapshot||"https://cdn.webrtc-experiment.com/images/muted.png"}):e.mediaElement.poster=e.snapshot||"https://cdn.webrtc-experiment.com/images/muted.png"}else"audio"===e.muteType&&(e.mediaElement.muted=!0)},connection.onunmute=function(e){e&&e.mediaElement&&e.stream&&("both"===e.unmuteType||"video"===e.unmuteType?(e.mediaElement.poster=null,e.mediaElement.srcObject=e.stream,e.mediaElement.play()):"audio"===e.unmuteType&&(e.mediaElement.muted=!1))},connection.onExtraDataUpdated=function(event){event.status="online",connection.onUserStatusChanged(event,!0)},connection.getAllParticipants=function(sender){return connection.peers.getAllParticipants(sender)},"undefined"!=typeof StreamsHandler&&(StreamsHandler.onSyncNeeded=function(streamid,action,type){connection.peers.getAllParticipants().forEach(function(participant){mPeer.onNegotiationNeeded({streamid:streamid,action:action,streamSyncNeeded:!0,type:type||"both"},participant)})}),connection.connectSocket=function(callback){connectSocket(callback)},connection.closeSocket=function(){try{io.sockets={}}catch(e){}connection.socket&&("function"==typeof connection.socket.disconnect&&connection.socket.disconnect(),"function"==typeof connection.socket.resetProps&&connection.socket.resetProps(),connection.socket=null)},connection.getSocket=function(callback){return!callback&&connection.enableLogs&&console.warn("getSocket.callback paramter is required."),callback=callback||function(){},connection.socket?callback(connection.socket):connectSocket(function(){callback(connection.socket)}),connection.socket},connection.getRemoteStreams=mPeer.getRemoteStreams;var skipStreams=["selectFirst","selectAll","forEach"];if(connection.streamEvents={selectFirst:function(options){return connection.streamEvents.selectAll(options)[0]},selectAll:function(options){options||(options={local:!0,remote:!0,isScreen:!0,isAudio:!0,isVideo:!0}),"local"==options&&(options={local:!0}),"remote"==options&&(options={remote:!0}),"screen"==options&&(options={isScreen:!0}),"audio"==options&&(options={isAudio:!0}),"video"==options&&(options={isVideo:!0});var streams=[];return Object.keys(connection.streamEvents).forEach(function(key){var event=connection.streamEvents[key];if(skipStreams.indexOf(key)===-1){var ignore=!0;options.local&&"local"===event.type&&(ignore=!1),options.remote&&"remote"===event.type&&(ignore=!1),options.isScreen&&event.stream.isScreen&&(ignore=!1),options.isVideo&&event.stream.isVideo&&(ignore=!1),options.isAudio&&event.stream.isAudio&&(ignore=!1),options.userid&&event.userid===options.userid&&(ignore=!1),ignore===!1&&streams.push(event)}}),streams}},connection.socketURL="/",connection.socketMessageEvent="RTCMultiConnection-Message",connection.socketCustomEvent="RTCMultiConnection-Custom-Message",connection.DetectRTC=DetectRTC,connection.setCustomSocketEvent=function(customEvent){customEvent&&(connection.socketCustomEvent=customEvent),connection.socket&&connection.socket.emit("set-custom-socket-event-listener",connection.socketCustomEvent)},connection.getNumberOfBroadcastViewers=function(broadcastId,callback){connection.socket&&broadcastId&&callback&&connection.socket.emit("get-number-of-users-in-specific-broadcast",broadcastId,callback)},connection.onNumberOfBroadcastViewersUpdated=function(event){connection.enableLogs&&connection.isInitiator&&console.info("Number of broadcast (",event.broadcastId,") viewers",event.numberOfBroadcastViewers)},connection.onUserStatusChanged=function(event,dontWriteLogs){connection.enableLogs&&!dontWriteLogs&&console.info(event.userid,event.status)},connection.getUserMediaHandler=getUserMediaHandler,connection.multiPeersHandler=mPeer,connection.enableLogs=!0,connection.setCustomSocketHandler=function(customSocketHandler){"undefined"!=typeof SocketConnection&&(SocketConnection=customSocketHandler)},connection.chunkSize=4e4,connection.maxParticipantsAllowed=1e3,connection.disconnectWith=mPeer.disconnectWith,connection.checkPresence=function(roomid,callback){return roomid=roomid||connection.sessionid,"SSEConnection"===SocketConnection.name?void SSEConnection.checkPresence(roomid,function(isRoomExist,_roomid,extra){return connection.socket?void callback(isRoomExist,_roomid):(isRoomExist||(connection.userid=_roomid),void connection.connectSocket(function(){callback(isRoomExist,_roomid,extra)}))}):connection.socket?void connection.socket.emit("check-presence",roomid+"",function(isRoomExist,_roomid,extra){connection.enableLogs&&console.log("checkPresence.isRoomExist: ",isRoomExist," roomid: ",_roomid),callback(isRoomExist,_roomid,extra)}):void connection.connectSocket(function(){connection.checkPresence(roomid,callback)})},connection.onReadyForOffer=function(remoteUserId,userPreferences){connection.multiPeersHandler.createNewPeer(remoteUserId,userPreferences)},connection.setUserPreferences=function(userPreferences){return connection.dontAttachStream&&(userPreferences.dontAttachLocalStream=!0),connection.dontGetRemoteStream&&(userPreferences.dontGetRemoteStream=!0),userPreferences},connection.updateExtraData=function(){connection.socket.emit("extra-data-updated",connection.extra)},connection.enableScalableBroadcast=!1,connection.maxRelayLimitPerUser=3,connection.dontCaptureUserMedia=!1,connection.dontAttachStream=!1,connection.dontGetRemoteStream=!1,connection.onReConnecting=function(event){connection.enableLogs&&console.info("ReConnecting with",event.userid,"...")},connection.beforeAddingStream=function(stream){return stream},connection.beforeRemovingStream=function(stream){return stream},"undefined"!=typeof isChromeExtensionAvailable&&(connection.checkIfChromeExtensionAvailable=isChromeExtensionAvailable),"undefined"!=typeof isFirefoxExtensionAvailable&&(connection.checkIfChromeExtensionAvailable=isFirefoxExtensionAvailable),"undefined"!=typeof getChromeExtensionStatus&&(connection.getChromeExtensionStatus=getChromeExtensionStatus),connection.modifyScreenConstraints=function(screen_constraints){return screen_constraints},connection.onPeerStateChanged=function(state){connection.enableLogs&&state.iceConnectionState.search(/closed|failed/gi)!==-1&&console.error("Peer connection is closed between you & ",state.userid,state.extra,"state:",state.iceConnectionState)},connection.isOnline=!0,listenEventHandler("online",function(){connection.isOnline=!0}),listenEventHandler("offline",function(){connection.isOnline=!1}),connection.isLowBandwidth=!1,navigator&&navigator.connection&&navigator.connection.type&&(connection.isLowBandwidth=navigator.connection.type.toString().toLowerCase().search(/wifi|cell/g)!==-1,connection.isLowBandwidth)){if(connection.bandwidth={audio:!1,video:!1,screen:!1},connection.mediaConstraints.audio&&connection.mediaConstraints.audio.optional&&connection.mediaConstraints.audio.optional.length){var newArray=[];connection.mediaConstraints.audio.optional.forEach(function(opt){"undefined"==typeof opt.bandwidth&&newArray.push(opt)}),connection.mediaConstraints.audio.optional=newArray}if(connection.mediaConstraints.video&&connection.mediaConstraints.video.optional&&connection.mediaConstraints.video.optional.length){var newArray=[];connection.mediaConstraints.video.optional.forEach(function(opt){"undefined"==typeof opt.bandwidth&&newArray.push(opt)}),connection.mediaConstraints.video.optional=newArray}}connection.getExtraData=function(remoteUserId,callback){if(!remoteUserId)throw"remoteUserId is required.";return"function"==typeof callback?void connection.socket.emit("get-remote-user-extra-data",remoteUserId,function(extra,remoteUserId,error){callback(extra,remoteUserId,error)}):connection.peers[remoteUserId]?connection.peers[remoteUserId].extra:connection.peersBackup[remoteUserId]?connection.peersBackup[remoteUserId].extra:{}},forceOptions.autoOpenOrJoin&&connection.openOrJoin(connection.sessionid),connection.onUserIdAlreadyTaken=function(useridAlreadyTaken,yourNewUserId){connection.close(),connection.closeSocket(),connection.isInitiator=!1,connection.userid=connection.token(),connection.join(connection.sessionid),connection.enableLogs&&console.warn("Userid already taken.",useridAlreadyTaken,"Your new userid:",connection.userid)},connection.trickleIce=!0,connection.version="3.7.0",connection.onSettingLocalDescription=function(event){connection.enableLogs&&console.info("Set local description for remote user",event.userid)},connection.resetScreen=function(){sourceId=null,DetectRTC&&DetectRTC.screen&&delete DetectRTC.screen.sourceId,currentUserMediaRequest={streams:[],mutex:!1,queueRequests:[]}},connection.autoCreateMediaElement=!0,connection.password=null,connection.setPassword=function(password,callback){callback=callback||function(){},connection.socket?connection.socket.emit("set-password",password,callback):(connection.password=password,callback(!0,connection.sessionid,null))},connection.onSocketDisconnect=function(event){connection.enableLogs&&console.warn("socket.io connection is closed")},connection.onSocketError=function(event){connection.enableLogs&&console.warn("socket.io connection is failed")},connection.errors={ROOM_NOT_AVAILABLE:"Room not available",INVALID_PASSWORD:"Invalid password",USERID_NOT_AVAILABLE:"User ID does not exist",ROOM_PERMISSION_DENIED:"Room permission denied",ROOM_FULL:"Room full",DID_NOT_JOIN_ANY_ROOM:"Did not join any room yet",INVALID_SOCKET:"Invalid socket",PUBLIC_IDENTIFIER_MISSING:"publicRoomIdentifier is required",INVALID_ADMIN_CREDENTIAL:"Invalid username or password attempted"}}(this)};"undefined"!=typeof module&&(module.exports=exports=RTCMultiConnection),"function"==typeof define&&define.amd&&define("RTCMultiConnection",[],function(){return RTCMultiConnection});
\ No newline at end of file
+el.attachEvent&&el.attachEvent("on"+eventName,eventHandler)}),window.attachEventListener=function(video,type,listener,useCapture){video.addEventListener(type,listener,useCapture)};var MediaStream=window.MediaStream;"undefined"==typeof MediaStream&&"undefined"!=typeof webkitMediaStream&&(MediaStream=webkitMediaStream),"undefined"!=typeof MediaStream&&("stop"in MediaStream.prototype||(MediaStream.prototype.stop=function(){this.getTracks().forEach(function(track){track.stop()})})),window.iOSDefaultAudioOutputDevice=window.iOSDefaultAudioOutputDevice||"speaker",document.addEventListener("deviceready",setCordovaAPIs,!1),setCordovaAPIs();var RTCPeerConnection,defaults={};"undefined"!=typeof window.RTCPeerConnection?RTCPeerConnection=window.RTCPeerConnection:"undefined"!=typeof mozRTCPeerConnection?RTCPeerConnection=mozRTCPeerConnection:"undefined"!=typeof webkitRTCPeerConnection&&(RTCPeerConnection=webkitRTCPeerConnection);var RTCSessionDescription=window.RTCSessionDescription||window.mozRTCSessionDescription,RTCIceCandidate=window.RTCIceCandidate||window.mozRTCIceCandidate,MediaStreamTrack=window.MediaStreamTrack,CodecsHandler=function(){function preferCodec(sdp,codecName){var info=splitLines(sdp);return info.videoCodecNumbers?"vp8"===codecName&&info.vp8LineNumber===info.videoCodecNumbers[0]?sdp:"vp9"===codecName&&info.vp9LineNumber===info.videoCodecNumbers[0]?sdp:"h264"===codecName&&info.h264LineNumber===info.videoCodecNumbers[0]?sdp:sdp=preferCodecHelper(sdp,codecName,info):sdp}function preferCodecHelper(sdp,codec,info,ignore){var preferCodecNumber="";if("vp8"===codec){if(!info.vp8LineNumber)return sdp;preferCodecNumber=info.vp8LineNumber}if("vp9"===codec){if(!info.vp9LineNumber)return sdp;preferCodecNumber=info.vp9LineNumber}if("h264"===codec){if(!info.h264LineNumber)return sdp;preferCodecNumber=info.h264LineNumber}var newLine=info.videoCodecNumbersOriginal.split("SAVPF")[0]+"SAVPF ",newOrder=[preferCodecNumber];return ignore&&(newOrder=[]),info.videoCodecNumbers.forEach(function(codecNumber){codecNumber!==preferCodecNumber&&newOrder.push(codecNumber)}),newLine+=newOrder.join(" "),sdp=sdp.replace(info.videoCodecNumbersOriginal,newLine)}function splitLines(sdp){var info={};return sdp.split("\n").forEach(function(line){0===line.indexOf("m=video")&&(info.videoCodecNumbers=[],line.split("SAVPF")[1].split(" ").forEach(function(codecNumber){codecNumber=codecNumber.trim(),codecNumber&&codecNumber.length&&(info.videoCodecNumbers.push(codecNumber),info.videoCodecNumbersOriginal=line)})),line.indexOf("VP8/90000")===-1||info.vp8LineNumber||(info.vp8LineNumber=line.replace("a=rtpmap:","").split(" ")[0]),line.indexOf("VP9/90000")===-1||info.vp9LineNumber||(info.vp9LineNumber=line.replace("a=rtpmap:","").split(" ")[0]),line.indexOf("H264/90000")===-1||info.h264LineNumber||(info.h264LineNumber=line.replace("a=rtpmap:","").split(" ")[0])}),info}function removeVPX(sdp){var info=splitLines(sdp);return sdp=preferCodecHelper(sdp,"vp9",info,!0),sdp=preferCodecHelper(sdp,"vp8",info,!0)}function disableNACK(sdp){if(!sdp||"string"!=typeof sdp)throw"Invalid arguments.";return sdp=sdp.replace("a=rtcp-fb:126 nack\r\n",""),sdp=sdp.replace("a=rtcp-fb:126 nack pli\r\n","a=rtcp-fb:126 pli\r\n"),sdp=sdp.replace("a=rtcp-fb:97 nack\r\n",""),sdp=sdp.replace("a=rtcp-fb:97 nack pli\r\n","a=rtcp-fb:97 pli\r\n")}function prioritize(codecMimeType,peer){if(peer&&peer.getSenders&&peer.getSenders().length){if(!codecMimeType||"string"!=typeof codecMimeType)throw"Invalid arguments.";peer.getSenders().forEach(function(sender){for(var params=sender.getParameters(),i=0;i<params.codecs.length;i++)if(params.codecs[i].mimeType==codecMimeType){params.codecs.unshift(params.codecs.splice(i,1));break}sender.setParameters(params)})}}function removeNonG722(sdp){return sdp.replace(/m=audio ([0-9]+) RTP\/SAVPF ([0-9 ]*)/g,"m=audio $1 RTP/SAVPF 9")}function setBAS(sdp,bandwidth,isScreen){return bandwidth?"undefined"!=typeof isFirefox&&isFirefox?sdp:(isScreen&&(bandwidth.screen?bandwidth.screen<300&&console.warn("It seems that you are using wrong bandwidth value for screen. Screen sharing is expected to fail."):console.warn("It seems that you are not using bandwidth for screen. Screen sharing is expected to fail.")),bandwidth.screen&&isScreen&&(sdp=sdp.replace(/b=AS([^\r\n]+\r\n)/g,""),sdp=sdp.replace(/a=mid:video\r\n/g,"a=mid:video\r\nb=AS:"+bandwidth.screen+"\r\n")),(bandwidth.audio||bandwidth.video)&&(sdp=sdp.replace(/b=AS([^\r\n]+\r\n)/g,"")),bandwidth.audio&&(sdp=sdp.replace(/a=mid:audio\r\n/g,"a=mid:audio\r\nb=AS:"+bandwidth.audio+"\r\n")),bandwidth.screen?sdp=sdp.replace(/a=mid:video\r\n/g,"a=mid:video\r\nb=AS:"+bandwidth.screen+"\r\n"):bandwidth.video&&(sdp=sdp.replace(/a=mid:video\r\n/g,"a=mid:video\r\nb=AS:"+bandwidth.video+"\r\n")),sdp):sdp}function findLine(sdpLines,prefix,substr){return findLineInRange(sdpLines,0,-1,prefix,substr)}function findLineInRange(sdpLines,startLine,endLine,prefix,substr){for(var realEndLine=endLine!==-1?endLine:sdpLines.length,i=startLine;i<realEndLine;++i)if(0===sdpLines[i].indexOf(prefix)&&(!substr||sdpLines[i].toLowerCase().indexOf(substr.toLowerCase())!==-1))return i;return null}function getCodecPayloadType(sdpLine){var pattern=new RegExp("a=rtpmap:(\\d+) \\w+\\/\\d+"),result=sdpLine.match(pattern);return result&&2===result.length?result[1]:null}function setVideoBitrates(sdp,params){params=params||{};var vp8Payload,xgoogle_min_bitrate=params.min,xgoogle_max_bitrate=params.max,sdpLines=sdp.split("\r\n"),vp8Index=findLine(sdpLines,"a=rtpmap","VP8/90000");if(vp8Index&&(vp8Payload=getCodecPayloadType(sdpLines[vp8Index])),!vp8Payload)return sdp;var rtxPayload,rtxIndex=findLine(sdpLines,"a=rtpmap","rtx/90000");if(rtxIndex&&(rtxPayload=getCodecPayloadType(sdpLines[rtxIndex])),!rtxIndex)return sdp;var rtxFmtpLineIndex=findLine(sdpLines,"a=fmtp:"+rtxPayload.toString());if(null!==rtxFmtpLineIndex){var appendrtxNext="\r\n";appendrtxNext+="a=fmtp:"+vp8Payload+" x-google-min-bitrate="+(xgoogle_min_bitrate||"228")+"; x-google-max-bitrate="+(xgoogle_max_bitrate||"228"),sdpLines[rtxFmtpLineIndex]=sdpLines[rtxFmtpLineIndex].concat(appendrtxNext),sdp=sdpLines.join("\r\n")}return sdp}function setOpusAttributes(sdp,params){params=params||{};var opusPayload,sdpLines=sdp.split("\r\n"),opusIndex=findLine(sdpLines,"a=rtpmap","opus/48000");if(opusIndex&&(opusPayload=getCodecPayloadType(sdpLines[opusIndex])),!opusPayload)return sdp;var opusFmtpLineIndex=findLine(sdpLines,"a=fmtp:"+opusPayload.toString());if(null===opusFmtpLineIndex)return sdp;var appendOpusNext="";return appendOpusNext+="; stereo="+("undefined"!=typeof params.stereo?params.stereo:"1"),appendOpusNext+="; sprop-stereo="+("undefined"!=typeof params["sprop-stereo"]?params["sprop-stereo"]:"1"),"undefined"!=typeof params.maxaveragebitrate&&(appendOpusNext+="; maxaveragebitrate="+(params.maxaveragebitrate||1048576)),"undefined"!=typeof params.maxplaybackrate&&(appendOpusNext+="; maxplaybackrate="+(params.maxplaybackrate||1048576)),"undefined"!=typeof params.cbr&&(appendOpusNext+="; cbr="+("undefined"!=typeof params.cbr?params.cbr:"1")),"undefined"!=typeof params.useinbandfec&&(appendOpusNext+="; useinbandfec="+params.useinbandfec),"undefined"!=typeof params.usedtx&&(appendOpusNext+="; usedtx="+params.usedtx),"undefined"!=typeof params.maxptime&&(appendOpusNext+="\r\na=maxptime:"+params.maxptime),sdpLines[opusFmtpLineIndex]=sdpLines[opusFmtpLineIndex].concat(appendOpusNext),sdp=sdpLines.join("\r\n")}function forceStereoAudio(sdp){for(var sdpLines=sdp.split("\r\n"),fmtpLineIndex=null,i=0;i<sdpLines.length;i++)if(sdpLines[i].search("opus/48000")!==-1){var opusPayload=extractSdp(sdpLines[i],/:(\d+) opus\/48000/i);break}for(var i=0;i<sdpLines.length;i++)if(sdpLines[i].search("a=fmtp")!==-1){var payload=extractSdp(sdpLines[i],/a=fmtp:(\d+)/);if(payload===opusPayload){fmtpLineIndex=i;break}}return null===fmtpLineIndex?sdp:(sdpLines[fmtpLineIndex]=sdpLines[fmtpLineIndex].concat("; stereo=1; sprop-stereo=1"),sdp=sdpLines.join("\r\n"))}return{removeVPX:removeVPX,disableNACK:disableNACK,prioritize:prioritize,removeNonG722:removeNonG722,setApplicationSpecificBandwidth:function(sdp,bandwidth,isScreen){return setBAS(sdp,bandwidth,isScreen)},setVideoBitrates:function(sdp,params){return setVideoBitrates(sdp,params)},setOpusAttributes:function(sdp,params){return setOpusAttributes(sdp,params)},preferVP9:function(sdp){return preferCodec(sdp,"vp9")},preferCodec:preferCodec,forceStereoAudio:forceStereoAudio}}();window.BandwidthHandler=CodecsHandler;var OnIceCandidateHandler=function(){function processCandidates(connection,icePair){var candidate=icePair.candidate,iceRestrictions=connection.candidates,stun=iceRestrictions.stun,turn=iceRestrictions.turn;if(isNull(iceRestrictions.reflexive)||(stun=iceRestrictions.reflexive),isNull(iceRestrictions.relay)||(turn=iceRestrictions.relay),(iceRestrictions.host||!candidate.match(/typ host/g))&&(turn||!candidate.match(/typ relay/g))&&(stun||!candidate.match(/typ srflx/g))){var protocol=connection.iceProtocols;if((protocol.udp||!candidate.match(/ udp /g))&&(protocol.tcp||!candidate.match(/ tcp /g)))return connection.enableLogs&&console.debug("Your candidate pairs:",candidate),{candidate:candidate,sdpMid:icePair.sdpMid,sdpMLineIndex:icePair.sdpMLineIndex}}}return{processCandidates:processCandidates}}(),IceServersHandler=function(){function getIceServers(connection){var iceServers=[{urls:["stun:stun.l.google.com:19302","stun:stun1.l.google.com:19302","stun:stun2.l.google.com:19302","stun:stun.l.google.com:19302?transport=udp"]}];return iceServers}return{getIceServers:getIceServers}}();window.currentUserMediaRequest={streams:[],mutex:!1,queueRequests:[],remove:function(idInstance){this.mutex=!1;var stream=this.streams[idInstance];if(stream){stream=stream.stream;var options=stream.currentUserMediaRequestOptions;this.queueRequests.indexOf(options)&&(delete this.queueRequests[this.queueRequests.indexOf(options)],this.queueRequests=removeNullEntries(this.queueRequests)),this.streams[idInstance].stream=null,delete this.streams[idInstance]}}};var StreamsHandler=function(){function handleType(type){if(type)return"string"==typeof type||"undefined"==typeof type?type:type.audio&&type.video?null:type.audio?"audio":type.video?"video":void 0}function setHandlers(stream,syncAction,connection){function graduallyIncreaseVolume(){if(connection.streamEvents[stream.streamid].mediaElement){var mediaElement=connection.streamEvents[stream.streamid].mediaElement;mediaElement.volume=0,afterEach(200,5,function(){try{mediaElement.volume+=.2}catch(e){mediaElement.volume=1}})}}if(stream&&stream.addEventListener){if("undefined"==typeof syncAction||1==syncAction){var streamEndedEvent="ended";"oninactive"in stream&&(streamEndedEvent="inactive"),stream.addEventListener(streamEndedEvent,function(){StreamsHandler.onSyncNeeded(this.streamid,streamEndedEvent)},!1)}stream.mute=function(type,isSyncAction){type=handleType(type),"undefined"!=typeof isSyncAction&&(syncAction=isSyncAction),"undefined"!=typeof type&&"audio"!=type||getTracks(stream,"audio").forEach(function(track){track.enabled=!1,connection.streamEvents[stream.streamid].isAudioMuted=!0}),"undefined"!=typeof type&&"video"!=type||getTracks(stream,"video").forEach(function(track){track.enabled=!1}),"undefined"!=typeof syncAction&&1!=syncAction||StreamsHandler.onSyncNeeded(stream.streamid,"mute",type),connection.streamEvents[stream.streamid].muteType=type||"both",fireEvent(stream,"mute",type)},stream.unmute=function(type,isSyncAction){type=handleType(type),"undefined"!=typeof isSyncAction&&(syncAction=isSyncAction),graduallyIncreaseVolume(),"undefined"!=typeof type&&"audio"!=type||getTracks(stream,"audio").forEach(function(track){track.enabled=!0,connection.streamEvents[stream.streamid].isAudioMuted=!1}),"undefined"!=typeof type&&"video"!=type||(getTracks(stream,"video").forEach(function(track){track.enabled=!0}),"undefined"!=typeof type&&"video"==type&&connection.streamEvents[stream.streamid].isAudioMuted&&!function looper(times){times||(times=0),times++,times<100&&connection.streamEvents[stream.streamid].isAudioMuted&&(stream.mute("audio"),setTimeout(function(){looper(times)},50))}()),"undefined"!=typeof syncAction&&1!=syncAction||StreamsHandler.onSyncNeeded(stream.streamid,"unmute",type),connection.streamEvents[stream.streamid].unmuteType=type||"both",fireEvent(stream,"unmute",type)}}}function afterEach(setTimeoutInteval,numberOfTimes,callback,startedTimes){startedTimes=(startedTimes||0)+1,startedTimes>=numberOfTimes||setTimeout(function(){callback(),afterEach(setTimeoutInteval,numberOfTimes,callback,startedTimes)},setTimeoutInteval)}return{setHandlers:setHandlers,onSyncNeeded:function(streamid,action,type){}}}(),TextSender={send:function(config){function sendText(textMessage,text){var data={type:"text",uuid:uuid,sendingTime:sendingTime};textMessage&&(text=textMessage,data.packets=parseInt(text.length/packetSize)),text.length>packetSize?data.message=text.slice(0,packetSize):(data.message=text,data.last=!0,data.isobject=isobject),channel.send(data,remoteUserId),textToTransfer=text.slice(data.message.length),textToTransfer.length&&setTimeout(function(){sendText(null,textToTransfer)},connection.chunkInterval||100)}var connection=config.connection,channel=config.channel,remoteUserId=config.remoteUserId,initialText=config.text,packetSize=connection.chunkSize||1e3,textToTransfer="",isobject=!1;isString(initialText)||(isobject=!0,initialText=JSON.stringify(initialText));var uuid=getRandomString(),sendingTime=(new Date).getTime();sendText(initialText)}},FileProgressBarHandler=function(){function handle(connection){function updateLabel(progress,label){if(progress.position!==-1){var position=+progress.position.toFixed(2).split(".")[1]||100;label.innerHTML=position+"%"}}var progressHelper={};connection.onFileStart=function(file){var div=document.createElement("div");return div.title=file.name,div.innerHTML="<label>0%</label> <progress></progress>",file.remoteUserId&&(div.innerHTML+=" (Sharing with:"+file.remoteUserId+")"),connection.filesContainer||(connection.filesContainer=document.body||document.documentElement),connection.filesContainer.insertBefore(div,connection.filesContainer.firstChild),file.remoteUserId?(progressHelper[file.uuid]||(progressHelper[file.uuid]={}),progressHelper[file.uuid][file.remoteUserId]={div:div,progress:div.querySelector("progress"),label:div.querySelector("label")},void(progressHelper[file.uuid][file.remoteUserId].progress.max=file.maxChunks)):(progressHelper[file.uuid]={div:div,progress:div.querySelector("progress"),label:div.querySelector("label")},void(progressHelper[file.uuid].progress.max=file.maxChunks))},connection.onFileProgress=function(chunk){var helper=progressHelper[chunk.uuid];helper&&(chunk.remoteUserId&&!(helper=progressHelper[chunk.uuid][chunk.remoteUserId])||(helper.progress.value=chunk.currentPosition||chunk.maxChunks||helper.progress.max,updateLabel(helper.progress,helper.label)))},connection.onFileEnd=function(file){var helper=progressHelper[file.uuid];if(!helper)return void console.error("No such progress-helper element exist.",file);if(!file.remoteUserId||(helper=progressHelper[file.uuid][file.remoteUserId])){var div=helper.div;file.type.indexOf("image")!=-1?div.innerHTML='<a href="'+file.url+'" download="'+file.name+'">Download <strong style="color:red;">'+file.name+'</strong> </a><br /><img src="'+file.url+'" title="'+file.name+'" style="max-width: 80%;">':div.innerHTML='<a href="'+file.url+'" download="'+file.name+'">Download <strong style="color:red;">'+file.name+'</strong> </a><br /><iframe src="'+file.url+'" title="'+file.name+'" style="width: 80%;border: 0;height: inherit;margin-top:1em;"></iframe>'}}}return{handle:handle}}(),TranslationHandler=function(){function handle(connection){connection.autoTranslateText=!1,connection.language="en",connection.googKey="AIzaSyCgB5hmFY74WYB-EoWkhr9cAGr6TiTHrEE",connection.Translator={TranslateText:function(text,callback){var newScript=document.createElement("script");newScript.type="text/javascript";var sourceText=encodeURIComponent(text),randomNumber="method"+connection.token();window[randomNumber]=function(response){return response.data&&response.data.translations[0]&&callback?void callback(response.data.translations[0].translatedText):response.error&&"Daily Limit Exceeded"===response.error.message?void console.error('Text translation failed. Error message: "Daily Limit Exceeded."'):response.error?void console.error(response.error.message):void console.error(response)};var source="https://www.googleapis.com/language/translate/v2?key="+connection.googKey+"&target="+(connection.language||"en-US")+"&callback=window."+randomNumber+"&q="+sourceText;newScript.src=source,document.getElementsByTagName("head")[0].appendChild(newScript)},getListOfLanguages:function(callback){var xhr=new XMLHttpRequest;xhr.onreadystatechange=function(){if(xhr.readyState==XMLHttpRequest.DONE){var response=JSON.parse(xhr.responseText);if(response&&response.data&&response.data.languages)return void callback(response.data.languages);if(response.error&&"Daily Limit Exceeded"===response.error.message)return void console.error('Text translation failed. Error message: "Daily Limit Exceeded."');if(response.error)return void console.error(response.error.message);console.error(response)}};var url="https://www.googleapis.com/language/translate/v2/languages?key="+connection.googKey+"&target=en";xhr.open("GET",url,!0),xhr.send(null)}}}return{handle:handle}}();!function(connection){function onUserLeft(remoteUserId){connection.deletePeer(remoteUserId)}function connectSocket(connectCallback){if(connection.socketAutoReConnect=!0,connection.socket)return void(connectCallback&&connectCallback(connection.socket));if("undefined"==typeof SocketConnection)if("undefined"!=typeof FirebaseConnection)window.SocketConnection=FirebaseConnection;else{if("undefined"==typeof PubNubConnection)throw"SocketConnection.js seems missed.";window.SocketConnection=PubNubConnection}new SocketConnection(connection,function(s){connectCallback&&connectCallback(connection.socket)})}function joinRoom(connectionDescription,cb){connection.socket.emit("join-room",{sessionid:connection.sessionid,session:connection.session,mediaConstraints:connection.mediaConstraints,sdpConstraints:connection.sdpConstraints,streams:getStreamInfoForAdmin(),extra:connection.extra,password:"undefined"!=typeof connection.password&&"object"!=typeof connection.password?connection.password:""},function(isRoomJoined,error){if(isRoomJoined===!0){if(connection.enableLogs&&console.log("isRoomJoined: ",isRoomJoined," roomid: ",connection.sessionid),connection.peers[connection.sessionid])return;mPeer.onNegotiationNeeded(connectionDescription)}isRoomJoined===!1&&connection.enableLogs&&console.warn("isRoomJoined: ",error," roomid: ",connection.sessionid),cb(isRoomJoined,connection.sessionid,error)})}function openRoom(callback){connection.enableLogs&&console.log("Sending open-room signal to socket.io"),connection.waitingForLocalMedia=!1,connection.socket.emit("open-room",{sessionid:connection.sessionid,session:connection.session,mediaConstraints:connection.mediaConstraints,sdpConstraints:connection.sdpConstraints,streams:getStreamInfoForAdmin(),extra:connection.extra,identifier:connection.publicRoomIdentifier,password:"undefined"!=typeof connection.password&&"object"!=typeof connection.password?connection.password:""},function(isRoomOpened,error){isRoomOpened===!0&&(connection.enableLogs&&console.log("isRoomOpened: ",isRoomOpened," roomid: ",connection.sessionid),callback(isRoomOpened,connection.sessionid)),isRoomOpened===!1&&(connection.enableLogs&&console.warn("isRoomOpened: ",error," roomid: ",connection.sessionid),callback(isRoomOpened,connection.sessionid,error))})}function getStreamInfoForAdmin(){try{return connection.streamEvents.selectAll("local").map(function(event){return{streamid:event.streamid,tracks:event.stream.getTracks().length}})}catch(e){return[]}}function beforeJoin(userPreferences,callback){if(connection.dontCaptureUserMedia||userPreferences.isDataOnly)return void callback();var localMediaConstraints={};userPreferences.localPeerSdpConstraints.OfferToReceiveAudio&&(localMediaConstraints.audio=connection.mediaConstraints.audio),userPreferences.localPeerSdpConstraints.OfferToReceiveVideo&&(localMediaConstraints.video=connection.mediaConstraints.video);var session=userPreferences.session||connection.session;return session.oneway&&"two-way"!==session.audio&&"two-way"!==session.video&&"two-way"!==session.screen?void callback():(session.oneway&&session.audio&&"two-way"===session.audio&&(session={audio:!0}),void((session.audio||session.video||session.screen)&&(session.screen?"Edge"===DetectRTC.browser.name?navigator.getDisplayMedia({video:!0,audio:isAudioPlusTab(connection)}).then(function(screen){screen.isScreen=!0,mPeer.onGettingLocalMedia(screen),!session.audio&&!session.video||isAudioPlusTab(connection)?callback(screen):connection.invokeGetUserMedia(null,callback)},function(error){console.error("Unable to capture screen on Edge. HTTPs and version 17+ is required.")}):connection.invokeGetUserMedia({audio:isAudioPlusTab(connection),video:!0,isScreen:!0},!session.audio&&!session.video||isAudioPlusTab(connection)?callback:connection.invokeGetUserMedia(null,callback)):(session.audio||session.video)&&connection.invokeGetUserMedia(null,callback,session))))}function applyConstraints(stream,mediaConstraints){return stream?(mediaConstraints.audio&&getTracks(stream,"audio").forEach(function(track){track.applyConstraints(mediaConstraints.audio)}),void(mediaConstraints.video&&getTracks(stream,"video").forEach(function(track){track.applyConstraints(mediaConstraints.video)}))):void(connection.enableLogs&&console.error("No stream to applyConstraints."))}function replaceTrack(track,remoteUserId,isVideoTrack){return remoteUserId?void mPeer.replaceTrack(track,remoteUserId,isVideoTrack):void connection.peers.getAllParticipants().forEach(function(participant){mPeer.replaceTrack(track,participant,isVideoTrack)})}forceOptions=forceOptions||{useDefaultDevices:!0},connection.channel=connection.sessionid=(roomid||location.href.replace(/\/|:|#|\?|\$|\^|%|\.|`|~|!|\+|@|\[|\||]|\|*. /g,"").split("\n").join("").split("\r").join(""))+"";var mPeer=new MultiPeers(connection),preventDuplicateOnStreamEvents={};mPeer.onGettingLocalMedia=function(stream,callback){if(callback=callback||function(){},preventDuplicateOnStreamEvents[stream.streamid])return void callback();preventDuplicateOnStreamEvents[stream.streamid]=!0;try{stream.type="local"}catch(e){}connection.setStreamEndHandler(stream),getRMCMediaElement(stream,function(mediaElement){mediaElement.id=stream.streamid,mediaElement.muted=!0,mediaElement.volume=0,connection.attachStreams.indexOf(stream)===-1&&connection.attachStreams.push(stream),"undefined"!=typeof StreamsHandler&&StreamsHandler.setHandlers(stream,!0,connection),connection.streamEvents[stream.streamid]={stream:stream,type:"local",mediaElement:mediaElement,userid:connection.userid,extra:connection.extra,streamid:stream.streamid,isAudioMuted:!0};try{setHarkEvents(connection,connection.streamEvents[stream.streamid]),setMuteHandlers(connection,connection.streamEvents[stream.streamid]),connection.onstream(connection.streamEvents[stream.streamid])}catch(e){}callback()},connection)},mPeer.onGettingRemoteMedia=function(stream,remoteUserId){try{stream.type="remote"}catch(e){}connection.setStreamEndHandler(stream,"remote-stream"),getRMCMediaElement(stream,function(mediaElement){mediaElement.id=stream.streamid,"undefined"!=typeof StreamsHandler&&StreamsHandler.setHandlers(stream,!1,connection),connection.streamEvents[stream.streamid]={stream:stream,type:"remote",userid:remoteUserId,extra:connection.peers[remoteUserId]?connection.peers[remoteUserId].extra:{},mediaElement:mediaElement,streamid:stream.streamid},setMuteHandlers(connection,connection.streamEvents[stream.streamid]),connection.onstream(connection.streamEvents[stream.streamid])},connection)},mPeer.onRemovingRemoteMedia=function(stream,remoteUserId){var streamEvent=connection.streamEvents[stream.streamid];streamEvent||(streamEvent={stream:stream,type:"remote",userid:remoteUserId,extra:connection.peers[remoteUserId]?connection.peers[remoteUserId].extra:{},streamid:stream.streamid,mediaElement:connection.streamEvents[stream.streamid]?connection.streamEvents[stream.streamid].mediaElement:null}),connection.peersBackup[streamEvent.userid]&&(streamEvent.extra=connection.peersBackup[streamEvent.userid].extra),connection.onstreamended(streamEvent),delete connection.streamEvents[stream.streamid]},mPeer.onNegotiationNeeded=function(message,remoteUserId,callback){callback=callback||function(){},remoteUserId=remoteUserId||message.remoteUserId,message=message||"";var messageToDeliver={remoteUserId:remoteUserId,message:message,sender:connection.userid};message.remoteUserId&&message.message&&message.sender&&(messageToDeliver=message),connectSocket(function(){connection.socket.emit(connection.socketMessageEvent,messageToDeliver,callback)})},mPeer.onUserLeft=onUserLeft,mPeer.disconnectWith=function(remoteUserId,callback){connection.socket&&connection.socket.emit("disconnect-with",remoteUserId,callback||function(){}),connection.deletePeer(remoteUserId)},connection.socketOptions={transport:"polling"},connection.openOrJoin=function(roomid,callback){callback=callback||function(){},connection.checkPresence(roomid,function(isRoomExist,roomid){if(isRoomExist){connection.sessionid=roomid;var localPeerSdpConstraints=!1,remotePeerSdpConstraints=!1,isOneWay=!!connection.session.oneway,isDataOnly=isData(connection.session);remotePeerSdpConstraints={OfferToReceiveAudio:connection.sdpConstraints.mandatory.OfferToReceiveAudio,OfferToReceiveVideo:connection.sdpConstraints.mandatory.OfferToReceiveVideo},localPeerSdpConstraints={OfferToReceiveAudio:isOneWay?!!connection.session.audio:connection.sdpConstraints.mandatory.OfferToReceiveAudio,OfferToReceiveVideo:isOneWay?!!connection.session.video||!!connection.session.screen:connection.sdpConstraints.mandatory.OfferToReceiveVideo};var connectionDescription={remoteUserId:connection.sessionid,message:{newParticipationRequest:!0,isOneWay:isOneWay,isDataOnly:isDataOnly,localPeerSdpConstraints:localPeerSdpConstraints,remotePeerSdpConstraints:remotePeerSdpConstraints},sender:connection.userid};return void beforeJoin(connectionDescription.message,function(){joinRoom(connectionDescription,callback)})}return connection.waitingForLocalMedia=!0,connection.isInitiator=!0,connection.sessionid=roomid||connection.sessionid,isData(connection.session)?void openRoom(callback):void connection.captureUserMedia(function(){openRoom(callback)})})},connection.waitingForLocalMedia=!1,connection.open=function(roomid,callback){callback=callback||function(){},connection.waitingForLocalMedia=!0,connection.isInitiator=!0,connection.sessionid=roomid||connection.sessionid,connectSocket(function(){return isData(connection.session)?void openRoom(callback):void connection.captureUserMedia(function(){openRoom(callback)})})},connection.peersBackup={},connection.deletePeer=function(remoteUserId){if(remoteUserId&&connection.peers[remoteUserId]){var eventObject={userid:remoteUserId,extra:connection.peers[remoteUserId]?connection.peers[remoteUserId].extra:{}};if(connection.peersBackup[eventObject.userid]&&(eventObject.extra=connection.peersBackup[eventObject.userid].extra),connection.onleave(eventObject),connection.peers[remoteUserId]){connection.peers[remoteUserId].streams.forEach(function(stream){stream.stop()});var peer=connection.peers[remoteUserId].peer;if(peer&&"closed"!==peer.iceConnectionState)try{peer.close()}catch(e){}connection.peers[remoteUserId]&&(connection.peers[remoteUserId].peer=null,delete connection.peers[remoteUserId])}}},connection.rejoin=function(connectionDescription){if(!connection.isInitiator&&connectionDescription&&Object.keys(connectionDescription).length){var extra={};connection.peers[connectionDescription.remoteUserId]&&(extra=connection.peers[connectionDescription.remoteUserId].extra,connection.deletePeer(connectionDescription.remoteUserId)),connectionDescription&&connectionDescription.remoteUserId&&(connection.join(connectionDescription.remoteUserId),connection.onReConnecting({userid:connectionDescription.remoteUserId,extra:extra}))}},connection.join=function(remoteUserId,options){connection.sessionid=!!remoteUserId&&(remoteUserId.sessionid||remoteUserId.remoteUserId||remoteUserId)||connection.sessionid,connection.sessionid+="";var localPeerSdpConstraints=!1,remotePeerSdpConstraints=!1,isOneWay=!1,isDataOnly=!1;if(remoteUserId&&remoteUserId.session||!remoteUserId||"string"==typeof remoteUserId){var session=remoteUserId?remoteUserId.session||connection.session:connection.session;isOneWay=!!session.oneway,isDataOnly=isData(session),remotePeerSdpConstraints={OfferToReceiveAudio:connection.sdpConstraints.mandatory.OfferToReceiveAudio,OfferToReceiveVideo:connection.sdpConstraints.mandatory.OfferToReceiveVideo},localPeerSdpConstraints={OfferToReceiveAudio:isOneWay?!!connection.session.audio:connection.sdpConstraints.mandatory.OfferToReceiveAudio,OfferToReceiveVideo:isOneWay?!!connection.session.video||!!connection.session.screen:connection.sdpConstraints.mandatory.OfferToReceiveVideo}}options=options||{};var cb=function(){};"function"==typeof options&&(cb=options,options={}),"undefined"!=typeof options.localPeerSdpConstraints&&(localPeerSdpConstraints=options.localPeerSdpConstraints),"undefined"!=typeof options.remotePeerSdpConstraints&&(remotePeerSdpConstraints=options.remotePeerSdpConstraints),"undefined"!=typeof options.isOneWay&&(isOneWay=options.isOneWay),"undefined"!=typeof options.isDataOnly&&(isDataOnly=options.isDataOnly);var connectionDescription={remoteUserId:connection.sessionid,message:{newParticipationRequest:!0,isOneWay:isOneWay,isDataOnly:isDataOnly,localPeerSdpConstraints:localPeerSdpConstraints,remotePeerSdpConstraints:remotePeerSdpConstraints},sender:connection.userid};return beforeJoin(connectionDescription.message,function(){connectSocket(function(){joinRoom(connectionDescription,cb)})}),connectionDescription},connection.publicRoomIdentifier="",connection.getUserMedia=connection.captureUserMedia=function(callback,sessionForced){callback=callback||function(){};var session=sessionForced||connection.session;return connection.dontCaptureUserMedia||isData(session)?void callback():void((session.audio||session.video||session.screen)&&(session.screen?"Edge"===DetectRTC.browser.name?navigator.getDisplayMedia({video:!0,audio:isAudioPlusTab(connection)}).then(function(screen){if(screen.isScreen=!0,mPeer.onGettingLocalMedia(screen),(session.audio||session.video)&&!isAudioPlusTab(connection)){var nonScreenSession={};for(var s in session)"screen"!==s&&(nonScreenSession[s]=session[s]);return void connection.invokeGetUserMedia(sessionForced,callback,nonScreenSession)}callback(screen)},function(error){console.error("Unable to capture screen on Edge. HTTPs and version 17+ is required.")}):connection.invokeGetUserMedia({audio:isAudioPlusTab(connection),video:!0,isScreen:!0},function(stream){if((session.audio||session.video)&&!isAudioPlusTab(connection)){var nonScreenSession={};for(var s in session)"screen"!==s&&(nonScreenSession[s]=session[s]);return void connection.invokeGetUserMedia(sessionForced,callback,nonScreenSession)}callback(stream)}):(session.audio||session.video)&&connection.invokeGetUserMedia(sessionForced,callback,session)))},connection.onbeforeunload=function(arg1,dontCloseSocket){connection.closeBeforeUnload&&(connection.peers.getAllParticipants().forEach(function(participant){mPeer.onNegotiationNeeded({userLeft:!0},participant),connection.peers[participant]&&connection.peers[participant].peer&&connection.peers[participant].peer.close(),delete connection.peers[participant]}),dontCloseSocket||connection.closeSocket(),connection.isInitiator=!1)},window.ignoreBeforeUnload?connection.closeBeforeUnload=!1:(connection.closeBeforeUnload=!0,
+window.addEventListener("beforeunload",connection.onbeforeunload,!1)),connection.userid=getRandomString(),connection.changeUserId=function(newUserId,callback){callback=callback||function(){},connection.userid=newUserId||getRandomString(),connection.socket.emit("changed-uuid",connection.userid,callback)},connection.extra={},connection.attachStreams=[],connection.session={audio:!0,video:!0},connection.enableFileSharing=!1,connection.bandwidth={screen:!1,audio:!1,video:!1},connection.codecs={audio:"opus",video:"VP9"},connection.processSdp=function(sdp){return isUnifiedPlanSupportedDefault()?sdp:"Safari"===DetectRTC.browser.name?sdp:("VP8"===connection.codecs.video.toUpperCase()&&(sdp=CodecsHandler.preferCodec(sdp,"vp8")),"VP9"===connection.codecs.video.toUpperCase()&&(sdp=CodecsHandler.preferCodec(sdp,"vp9")),"H264"===connection.codecs.video.toUpperCase()&&(sdp=CodecsHandler.preferCodec(sdp,"h264")),"G722"===connection.codecs.audio&&(sdp=CodecsHandler.removeNonG722(sdp)),"Firefox"===DetectRTC.browser.name?sdp:((connection.bandwidth.video||connection.bandwidth.screen)&&(sdp=CodecsHandler.setApplicationSpecificBandwidth(sdp,connection.bandwidth,!!connection.session.screen)),connection.bandwidth.video&&(sdp=CodecsHandler.setVideoBitrates(sdp,{min:8*connection.bandwidth.video*1024,max:8*connection.bandwidth.video*1024})),connection.bandwidth.audio&&(sdp=CodecsHandler.setOpusAttributes(sdp,{maxaveragebitrate:8*connection.bandwidth.audio*1024,maxplaybackrate:8*connection.bandwidth.audio*1024,stereo:1,maxptime:3})),sdp))},"undefined"!=typeof CodecsHandler&&(connection.BandwidthHandler=connection.CodecsHandler=CodecsHandler),connection.mediaConstraints={audio:{mandatory:{},optional:connection.bandwidth.audio?[{bandwidth:8*connection.bandwidth.audio*1024||1048576}]:[]},video:{mandatory:{},optional:connection.bandwidth.video?[{bandwidth:8*connection.bandwidth.video*1024||1048576},{facingMode:"user"}]:[{facingMode:"user"}]}},"Firefox"===DetectRTC.browser.name&&(connection.mediaConstraints={audio:!0,video:!0}),forceOptions.useDefaultDevices||DetectRTC.isMobileDevice||DetectRTC.load(function(){var lastAudioDevice,lastVideoDevice;if(DetectRTC.MediaDevices.forEach(function(device){"audioinput"===device.kind&&connection.mediaConstraints.audio!==!1&&(lastAudioDevice=device),"videoinput"===device.kind&&connection.mediaConstraints.video!==!1&&(lastVideoDevice=device)}),lastAudioDevice){if("Firefox"===DetectRTC.browser.name)return void(connection.mediaConstraints.audio!==!0?connection.mediaConstraints.audio.deviceId=lastAudioDevice.id:connection.mediaConstraints.audio={deviceId:lastAudioDevice.id});1==connection.mediaConstraints.audio&&(connection.mediaConstraints.audio={mandatory:{},optional:[]}),connection.mediaConstraints.audio.optional||(connection.mediaConstraints.audio.optional=[]);var optional=[{sourceId:lastAudioDevice.id}];connection.mediaConstraints.audio.optional=optional.concat(connection.mediaConstraints.audio.optional)}if(lastVideoDevice){if("Firefox"===DetectRTC.browser.name)return void(connection.mediaConstraints.video!==!0?connection.mediaConstraints.video.deviceId=lastVideoDevice.id:connection.mediaConstraints.video={deviceId:lastVideoDevice.id});1==connection.mediaConstraints.video&&(connection.mediaConstraints.video={mandatory:{},optional:[]}),connection.mediaConstraints.video.optional||(connection.mediaConstraints.video.optional=[]);var optional=[{sourceId:lastVideoDevice.id}];connection.mediaConstraints.video.optional=optional.concat(connection.mediaConstraints.video.optional)}}),connection.sdpConstraints={mandatory:{OfferToReceiveAudio:!0,OfferToReceiveVideo:!0},optional:[{VoiceActivityDetection:!1}]},connection.sdpSemantics=null,connection.iceCandidatePoolSize=null,connection.bundlePolicy=null,connection.rtcpMuxPolicy=null,connection.iceTransportPolicy=null,connection.optionalArgument={optional:[{DtlsSrtpKeyAgreement:!0},{googImprovedWifiBwe:!0},{googScreencastMinBitrate:300},{googIPv6:!0},{googDscp:!0},{googCpuUnderuseThreshold:55},{googCpuOveruseThreshold:85},{googSuspendBelowMinBitrate:!0},{googCpuOveruseDetection:!0}],mandatory:{}},connection.iceServers=IceServersHandler.getIceServers(connection),connection.candidates={host:!0,stun:!0,turn:!0},connection.iceProtocols={tcp:!0,udp:!0},connection.onopen=function(event){connection.enableLogs&&console.info("Data connection has been opened between you & ",event.userid)},connection.onclose=function(event){connection.enableLogs&&console.warn("Data connection has been closed between you & ",event.userid)},connection.onerror=function(error){connection.enableLogs&&console.error(error.userid,"data-error",error)},connection.onmessage=function(event){connection.enableLogs&&console.debug("data-message",event.userid,event.data)},connection.send=function(data,remoteUserId){connection.peers.send(data,remoteUserId)},connection.close=connection.disconnect=connection.leave=function(){connection.onbeforeunload(!1,!0)},connection.closeEntireSession=function(callback){callback=callback||function(){},connection.socket.emit("close-entire-session",function looper(){return connection.getAllParticipants().length?void setTimeout(looper,100):(connection.onEntireSessionClosed({sessionid:connection.sessionid,userid:connection.userid,extra:connection.extra}),void connection.changeUserId(null,function(){connection.close(),callback()}))})},connection.onEntireSessionClosed=function(event){connection.enableLogs&&console.info("Entire session is closed: ",event.sessionid,event.extra)},connection.onstream=function(e){var parentNode=connection.videosContainer;parentNode.insertBefore(e.mediaElement,parentNode.firstChild);var played=e.mediaElement.play();return"undefined"!=typeof played?void played["catch"](function(){}).then(function(){setTimeout(function(){e.mediaElement.play()},2e3)}):void setTimeout(function(){e.mediaElement.play()},2e3)},connection.onstreamended=function(e){e.mediaElement||(e.mediaElement=document.getElementById(e.streamid)),e.mediaElement&&e.mediaElement.parentNode&&e.mediaElement.parentNode.removeChild(e.mediaElement)},connection.direction="many-to-many",connection.removeStream=function(streamid,remoteUserId){var stream;return connection.attachStreams.forEach(function(localStream){localStream.id===streamid&&(stream=localStream)}),stream?(connection.peers.getAllParticipants().forEach(function(participant){if(!remoteUserId||participant===remoteUserId){var user=connection.peers[participant];try{user.peer.removeStream(stream)}catch(e){}}}),void connection.renegotiate()):void console.warn("No such stream exist.",streamid)},connection.addStream=function(session,remoteUserId){function gumCallback(stream){session.streamCallback&&session.streamCallback(stream),connection.renegotiate(remoteUserId)}return session.getTracks?(connection.attachStreams.indexOf(session)===-1&&(session.streamid||(session.streamid=session.id),connection.attachStreams.push(session)),void connection.renegotiate(remoteUserId)):isData(session)?void connection.renegotiate(remoteUserId):void((session.audio||session.video||session.screen)&&(session.screen?"Edge"===DetectRTC.browser.name?navigator.getDisplayMedia({video:!0,audio:isAudioPlusTab(connection)}).then(function(screen){screen.isScreen=!0,mPeer.onGettingLocalMedia(screen),!session.audio&&!session.video||isAudioPlusTab(connection)?gumCallback(screen):connection.invokeGetUserMedia(null,function(stream){gumCallback(stream)})},function(error){console.error("Unable to capture screen on Edge. HTTPs and version 17+ is required.")}):connection.invokeGetUserMedia({audio:isAudioPlusTab(connection),video:!0,isScreen:!0},function(stream){!session.audio&&!session.video||isAudioPlusTab(connection)?gumCallback(stream):connection.invokeGetUserMedia(null,function(stream){gumCallback(stream)})}):(session.audio||session.video)&&connection.invokeGetUserMedia(null,gumCallback)))},connection.invokeGetUserMedia=function(localMediaConstraints,callback,session){session||(session=connection.session),localMediaConstraints||(localMediaConstraints=connection.mediaConstraints),getUserMediaHandler({onGettingLocalMedia:function(stream){var videoConstraints=localMediaConstraints.video;videoConstraints&&(videoConstraints.mediaSource||videoConstraints.mozMediaSource?stream.isScreen=!0:videoConstraints.mandatory&&videoConstraints.mandatory.chromeMediaSource&&(stream.isScreen=!0)),stream.isScreen||(stream.isVideo=!!getTracks(stream,"video").length,stream.isAudio=!stream.isVideo&&getTracks(stream,"audio").length),mPeer.onGettingLocalMedia(stream,function(){"function"==typeof callback&&callback(stream)})},onLocalMediaError:function(error,constraints){mPeer.onLocalMediaError(error,constraints)},localMediaConstraints:localMediaConstraints||{audio:!!session.audio&&localMediaConstraints.audio,video:!!session.video&&localMediaConstraints.video}})},connection.applyConstraints=function(mediaConstraints,streamid){if(!MediaStreamTrack||!MediaStreamTrack.prototype.applyConstraints)return void alert("track.applyConstraints is NOT supported in your browser.");if(streamid){var stream;return connection.streamEvents[streamid]&&(stream=connection.streamEvents[streamid].stream),void applyConstraints(stream,mediaConstraints)}connection.attachStreams.forEach(function(stream){applyConstraints(stream,mediaConstraints)})},connection.replaceTrack=function(session,remoteUserId,isVideoTrack){function gumCallback(stream){connection.replaceTrack(stream,remoteUserId,isVideoTrack||session.video||session.screen)}if(session=session||{},!RTCPeerConnection.prototype.getSenders)return void connection.addStream(session);if(session instanceof MediaStreamTrack)return void replaceTrack(session,remoteUserId,isVideoTrack);if(session instanceof MediaStream)return getTracks(session,"video").length&&replaceTrack(getTracks(session,"video")[0],remoteUserId,!0),void(getTracks(session,"audio").length&&replaceTrack(getTracks(session,"audio")[0],remoteUserId,!1));if(isData(session))throw"connection.replaceTrack requires audio and/or video and/or screen.";(session.audio||session.video||session.screen)&&(session.screen?"Edge"===DetectRTC.browser.name?navigator.getDisplayMedia({video:!0,audio:isAudioPlusTab(connection)}).then(function(screen){screen.isScreen=!0,mPeer.onGettingLocalMedia(screen),!session.audio&&!session.video||isAudioPlusTab(connection)?gumCallback(screen):connection.invokeGetUserMedia(null,gumCallback)},function(error){console.error("Unable to capture screen on Edge. HTTPs and version 17+ is required.")}):connection.invokeGetUserMedia({audio:isAudioPlusTab(connection),video:!0,isScreen:!0},!session.audio&&!session.video||isAudioPlusTab(connection)?gumCallback:connection.invokeGetUserMedia(null,gumCallback)):(session.audio||session.video)&&connection.invokeGetUserMedia(null,gumCallback))},connection.resetTrack=function(remoteUsersIds,isVideoTrack){remoteUsersIds||(remoteUsersIds=connection.getAllParticipants()),"string"==typeof remoteUsersIds&&(remoteUsersIds=[remoteUsersIds]),remoteUsersIds.forEach(function(participant){var peer=connection.peers[participant].peer;"undefined"!=typeof isVideoTrack&&isVideoTrack!==!0||!peer.lastVideoTrack||connection.replaceTrack(peer.lastVideoTrack,participant,!0),"undefined"!=typeof isVideoTrack&&isVideoTrack!==!1||!peer.lastAudioTrack||connection.replaceTrack(peer.lastAudioTrack,participant,!1)})},connection.renegotiate=function(remoteUserId){return remoteUserId?void mPeer.renegotiatePeer(remoteUserId):void connection.peers.getAllParticipants().forEach(function(participant){mPeer.renegotiatePeer(participant)})},connection.setStreamEndHandler=function(stream,isRemote){if(stream&&stream.addEventListener&&(isRemote=!!isRemote,!stream.alreadySetEndHandler)){stream.alreadySetEndHandler=!0;var streamEndedEvent="ended";"oninactive"in stream&&(streamEndedEvent="inactive"),stream.addEventListener(streamEndedEvent,function(){if(stream.idInstance&&currentUserMediaRequest.remove(stream.idInstance),!isRemote){var streams=[];connection.attachStreams.forEach(function(s){s.id!=stream.id&&streams.push(s)}),connection.attachStreams=streams}var streamEvent=connection.streamEvents[stream.streamid];if(streamEvent||(streamEvent={stream:stream,streamid:stream.streamid,type:isRemote?"remote":"local",userid:connection.userid,extra:connection.extra,mediaElement:connection.streamEvents[stream.streamid]?connection.streamEvents[stream.streamid].mediaElement:null}),isRemote&&connection.peers[streamEvent.userid]){var peer=connection.peers[streamEvent.userid].peer,streams=[];peer.getRemoteStreams().forEach(function(s){s.id!=stream.id&&streams.push(s)}),connection.peers[streamEvent.userid].streams=streams}streamEvent.userid===connection.userid&&"remote"===streamEvent.type||(connection.peersBackup[streamEvent.userid]&&(streamEvent.extra=connection.peersBackup[streamEvent.userid].extra),connection.onstreamended(streamEvent),delete connection.streamEvents[stream.streamid])},!1)}},connection.onMediaError=function(error,constraints){connection.enableLogs&&console.error(error,constraints)},connection.autoCloseEntireSession=!1,connection.filesContainer=connection.videosContainer=document.body||document.documentElement,connection.isInitiator=!1,connection.shareFile=mPeer.shareFile,"undefined"!=typeof FileProgressBarHandler&&FileProgressBarHandler.handle(connection),"undefined"!=typeof TranslationHandler&&TranslationHandler.handle(connection),connection.token=getRandomString,connection.onNewParticipant=function(participantId,userPreferences){connection.acceptParticipationRequest(participantId,userPreferences)},connection.acceptParticipationRequest=function(participantId,userPreferences){userPreferences.successCallback&&(userPreferences.successCallback(),delete userPreferences.successCallback),mPeer.createNewPeer(participantId,userPreferences)},"undefined"!=typeof StreamsHandler&&(connection.StreamsHandler=StreamsHandler),connection.onleave=function(userid){},connection.invokeSelectFileDialog=function(callback){var selector=new FileSelector;selector.accept="*.*",selector.selectSingleFile(callback)},connection.onmute=function(e){if(e&&e.mediaElement)if("both"===e.muteType||"video"===e.muteType){e.mediaElement.src=null;var paused=e.mediaElement.pause();"undefined"!=typeof paused?paused.then(function(){e.mediaElement.poster=e.snapshot||"https://cdn.webrtc-experiment.com/images/muted.png"}):e.mediaElement.poster=e.snapshot||"https://cdn.webrtc-experiment.com/images/muted.png"}else"audio"===e.muteType&&(e.mediaElement.muted=!0)},connection.onunmute=function(e){e&&e.mediaElement&&e.stream&&("both"===e.unmuteType||"video"===e.unmuteType?(e.mediaElement.poster=null,e.mediaElement.srcObject=e.stream,e.mediaElement.play()):"audio"===e.unmuteType&&(e.mediaElement.muted=!1))},connection.onExtraDataUpdated=function(event){event.status="online",connection.onUserStatusChanged(event,!0)},connection.getAllParticipants=function(sender){return connection.peers.getAllParticipants(sender)},"undefined"!=typeof StreamsHandler&&(StreamsHandler.onSyncNeeded=function(streamid,action,type){connection.peers.getAllParticipants().forEach(function(participant){mPeer.onNegotiationNeeded({streamid:streamid,action:action,streamSyncNeeded:!0,type:type||"both"},participant)})}),connection.connectSocket=function(callback){connectSocket(callback)},connection.closeSocket=function(){try{io.sockets={}}catch(e){}connection.socket&&("function"==typeof connection.socket.disconnect&&connection.socket.disconnect(),"function"==typeof connection.socket.resetProps&&connection.socket.resetProps(),connection.socket=null)},connection.getSocket=function(callback){return!callback&&connection.enableLogs&&console.warn("getSocket.callback paramter is required."),callback=callback||function(){},connection.socket?callback(connection.socket):connectSocket(function(){callback(connection.socket)}),connection.socket},connection.getRemoteStreams=mPeer.getRemoteStreams;var skipStreams=["selectFirst","selectAll","forEach"];if(connection.streamEvents={selectFirst:function(options){return connection.streamEvents.selectAll(options)[0]},selectAll:function(options){options||(options={local:!0,remote:!0,isScreen:!0,isAudio:!0,isVideo:!0}),"local"==options&&(options={local:!0}),"remote"==options&&(options={remote:!0}),"screen"==options&&(options={isScreen:!0}),"audio"==options&&(options={isAudio:!0}),"video"==options&&(options={isVideo:!0});var streams=[];return Object.keys(connection.streamEvents).forEach(function(key){var event=connection.streamEvents[key];if(skipStreams.indexOf(key)===-1){var ignore=!0;options.local&&"local"===event.type&&(ignore=!1),options.remote&&"remote"===event.type&&(ignore=!1),options.isScreen&&event.stream.isScreen&&(ignore=!1),options.isVideo&&event.stream.isVideo&&(ignore=!1),options.isAudio&&event.stream.isAudio&&(ignore=!1),options.userid&&event.userid===options.userid&&(ignore=!1),ignore===!1&&streams.push(event)}}),streams}},connection.socketURL="/",connection.socketMessageEvent="RTCMultiConnection-Message",connection.socketCustomEvent="RTCMultiConnection-Custom-Message",connection.DetectRTC=DetectRTC,connection.setCustomSocketEvent=function(customEvent){customEvent&&(connection.socketCustomEvent=customEvent),connection.socket&&connection.socket.emit("set-custom-socket-event-listener",connection.socketCustomEvent)},connection.getNumberOfBroadcastViewers=function(broadcastId,callback){connection.socket&&broadcastId&&callback&&connection.socket.emit("get-number-of-users-in-specific-broadcast",broadcastId,callback)},connection.onNumberOfBroadcastViewersUpdated=function(event){connection.enableLogs&&connection.isInitiator&&console.info("Number of broadcast (",event.broadcastId,") viewers",event.numberOfBroadcastViewers)},connection.onUserStatusChanged=function(event,dontWriteLogs){connection.enableLogs&&!dontWriteLogs&&console.info(event.userid,event.status)},connection.getUserMediaHandler=getUserMediaHandler,connection.multiPeersHandler=mPeer,connection.enableLogs=!0,connection.setCustomSocketHandler=function(customSocketHandler){"undefined"!=typeof SocketConnection&&(SocketConnection=customSocketHandler)},connection.chunkSize=4e4,connection.maxParticipantsAllowed=1e3,connection.disconnectWith=mPeer.disconnectWith,connection.checkPresence=function(roomid,callback){return roomid=roomid||connection.sessionid,"SSEConnection"===SocketConnection.name?void SSEConnection.checkPresence(roomid,function(isRoomExist,_roomid,extra){return connection.socket?void callback(isRoomExist,_roomid):(isRoomExist||(connection.userid=_roomid),void connection.connectSocket(function(){callback(isRoomExist,_roomid,extra)}))}):connection.socket?void connection.socket.emit("check-presence",roomid+"",function(isRoomExist,_roomid,extra){connection.enableLogs&&console.log("checkPresence.isRoomExist: ",isRoomExist," roomid: ",_roomid),callback(isRoomExist,_roomid,extra)}):void connection.connectSocket(function(){connection.checkPresence(roomid,callback)})},connection.onReadyForOffer=function(remoteUserId,userPreferences){connection.multiPeersHandler.createNewPeer(remoteUserId,userPreferences)},connection.setUserPreferences=function(userPreferences){return connection.dontAttachStream&&(userPreferences.dontAttachLocalStream=!0),connection.dontGetRemoteStream&&(userPreferences.dontGetRemoteStream=!0),userPreferences},connection.updateExtraData=function(){connection.socket.emit("extra-data-updated",connection.extra)},connection.enableScalableBroadcast=!1,connection.maxRelayLimitPerUser=3,connection.dontCaptureUserMedia=!1,connection.dontAttachStream=!1,connection.dontGetRemoteStream=!1,connection.onReConnecting=function(event){connection.enableLogs&&console.info("ReConnecting with",event.userid,"...")},connection.beforeAddingStream=function(stream){return stream},connection.beforeRemovingStream=function(stream){return stream},"undefined"!=typeof isChromeExtensionAvailable&&(connection.checkIfChromeExtensionAvailable=isChromeExtensionAvailable),"undefined"!=typeof isFirefoxExtensionAvailable&&(connection.checkIfChromeExtensionAvailable=isFirefoxExtensionAvailable),"undefined"!=typeof getChromeExtensionStatus&&(connection.getChromeExtensionStatus=getChromeExtensionStatus),connection.modifyScreenConstraints=function(screen_constraints){return screen_constraints},connection.onPeerStateChanged=function(state){connection.enableLogs&&state.iceConnectionState.search(/closed|failed/gi)!==-1&&console.error("Peer connection is closed between you & ",state.userid,state.extra,"state:",state.iceConnectionState)},connection.isOnline=!0,listenEventHandler("online",function(){connection.isOnline=!0}),listenEventHandler("offline",function(){connection.isOnline=!1}),connection.isLowBandwidth=!1,navigator&&navigator.connection&&navigator.connection.type&&(connection.isLowBandwidth=navigator.connection.type.toString().toLowerCase().search(/wifi|cell/g)!==-1,connection.isLowBandwidth)){if(connection.bandwidth={audio:!1,video:!1,screen:!1},connection.mediaConstraints.audio&&connection.mediaConstraints.audio.optional&&connection.mediaConstraints.audio.optional.length){var newArray=[];connection.mediaConstraints.audio.optional.forEach(function(opt){"undefined"==typeof opt.bandwidth&&newArray.push(opt)}),connection.mediaConstraints.audio.optional=newArray}if(connection.mediaConstraints.video&&connection.mediaConstraints.video.optional&&connection.mediaConstraints.video.optional.length){var newArray=[];connection.mediaConstraints.video.optional.forEach(function(opt){"undefined"==typeof opt.bandwidth&&newArray.push(opt)}),connection.mediaConstraints.video.optional=newArray}}connection.getExtraData=function(remoteUserId,callback){if(!remoteUserId)throw"remoteUserId is required.";return"function"==typeof callback?void connection.socket.emit("get-remote-user-extra-data",remoteUserId,function(extra,remoteUserId,error){callback(extra,remoteUserId,error)}):connection.peers[remoteUserId]?connection.peers[remoteUserId].extra:connection.peersBackup[remoteUserId]?connection.peersBackup[remoteUserId].extra:{}},forceOptions.autoOpenOrJoin&&connection.openOrJoin(connection.sessionid),connection.onUserIdAlreadyTaken=function(useridAlreadyTaken,yourNewUserId){connection.close(),connection.closeSocket(),connection.isInitiator=!1,connection.userid=connection.token(),connection.join(connection.sessionid),connection.enableLogs&&console.warn("Userid already taken.",useridAlreadyTaken,"Your new userid:",connection.userid)},connection.trickleIce=!0,connection.version="3.6.9",connection.onSettingLocalDescription=function(event){connection.enableLogs&&console.info("Set local description for remote user",event.userid)},connection.resetScreen=function(){sourceId=null,DetectRTC&&DetectRTC.screen&&delete DetectRTC.screen.sourceId,currentUserMediaRequest={streams:[],mutex:!1,queueRequests:[]}},connection.autoCreateMediaElement=!0,connection.password=null,connection.setPassword=function(password,callback){callback=callback||function(){},connection.socket?connection.socket.emit("set-password",password,callback):(connection.password=password,callback(!0,connection.sessionid,null))},connection.onSocketDisconnect=function(event){connection.enableLogs&&console.warn("socket.io connection is closed")},connection.onSocketError=function(event){connection.enableLogs&&console.warn("socket.io connection is failed")},connection.errors={ROOM_NOT_AVAILABLE:"Room not available",INVALID_PASSWORD:"Invalid password",USERID_NOT_AVAILABLE:"User ID does not exist",ROOM_PERMISSION_DENIED:"Room permission denied",ROOM_FULL:"Room full",DID_NOT_JOIN_ANY_ROOM:"Did not join any room yet",INVALID_SOCKET:"Invalid socket",PUBLIC_IDENTIFIER_MISSING:"publicRoomIdentifier is required",INVALID_ADMIN_CREDENTIAL:"Invalid username or password attempted"}}(this)};"undefined"!=typeof module&&(module.exports=exports=RTCMultiConnection),"function"==typeof define&&define.amd&&define("RTCMultiConnection",[],function(){return RTCMultiConnection});
\ No newline at end of file
diff --git a/dist/adapter.js b/dist/adapter.js
new file mode 100644
index 0000000..59e9bfe
--- /dev/null
+++ b/dist/adapter.js
@@ -0,0 +1,3480 @@
+(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.adapter = f()}})(function(){var define,module,exports;return (function(){function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c="function"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error("Cannot find module '"+i+"'");throw a.code="MODULE_NOT_FOUND",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u="function"==typeof require&&require,i=0;i<t.length;i++)o(t[i]);return o}return r})()({1:[function(require,module,exports){
+/*
+ *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+/* eslint-env node */
+
+'use strict';
+
+var _adapter_factory = require('./adapter_factory.js');
+
+var adapter = (0, _adapter_factory.adapterFactory)({ window: typeof window === 'undefined' ? undefined : window });
+module.exports = adapter; // this is the difference from adapter_core.
+
+},{"./adapter_factory.js":2}],2:[function(require,module,exports){
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.adapterFactory = adapterFactory;
+
+var _utils = require('./utils');
+
+var utils = _interopRequireWildcard(_utils);
+
+var _chrome_shim = require('./chrome/chrome_shim');
+
+var chromeShim = _interopRequireWildcard(_chrome_shim);
+
+var _firefox_shim = require('./firefox/firefox_shim');
+
+var firefoxShim = _interopRequireWildcard(_firefox_shim);
+
+var _safari_shim = require('./safari/safari_shim');
+
+var safariShim = _interopRequireWildcard(_safari_shim);
+
+var _common_shim = require('./common_shim');
+
+var commonShim = _interopRequireWildcard(_common_shim);
+
+var _sdp = require('sdp');
+
+var sdp = _interopRequireWildcard(_sdp);
+
+function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }
+
+// Shimming starts here.
+/*
+ *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+function adapterFactory() {
+  var _ref = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {},
+      window = _ref.window;
+
+  var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {
+    shimChrome: true,
+    shimFirefox: true,
+    shimSafari: true
+  };
+
+  // Utils.
+  var logging = utils.log;
+  var browserDetails = utils.detectBrowser(window);
+
+  var adapter = {
+    browserDetails: browserDetails,
+    commonShim: commonShim,
+    extractVersion: utils.extractVersion,
+    disableLog: utils.disableLog,
+    disableWarnings: utils.disableWarnings,
+    // Expose sdp as a convenience. For production apps include directly.
+    sdp: sdp
+  };
+
+  // Shim browser if found.
+  switch (browserDetails.browser) {
+    case 'chrome':
+      if (!chromeShim || !chromeShim.shimPeerConnection || !options.shimChrome) {
+        logging('Chrome shim is not included in this adapter release.');
+        return adapter;
+      }
+      if (browserDetails.version === null) {
+        logging('Chrome shim can not determine version, not shimming.');
+        return adapter;
+      }
+      logging('adapter.js shimming chrome.');
+      // Export to the adapter global object visible in the browser.
+      adapter.browserShim = chromeShim;
+
+      // Must be called before shimPeerConnection.
+      commonShim.shimAddIceCandidateNullOrEmpty(window, browserDetails);
+      commonShim.shimParameterlessSetLocalDescription(window, browserDetails);
+
+      chromeShim.shimGetUserMedia(window, browserDetails);
+      chromeShim.shimMediaStream(window, browserDetails);
+      chromeShim.shimPeerConnection(window, browserDetails);
+      chromeShim.shimOnTrack(window, browserDetails);
+      chromeShim.shimAddTrackRemoveTrack(window, browserDetails);
+      chromeShim.shimGetSendersWithDtmf(window, browserDetails);
+      chromeShim.shimGetStats(window, browserDetails);
+      chromeShim.shimSenderReceiverGetStats(window, browserDetails);
+      chromeShim.fixNegotiationNeeded(window, browserDetails);
+
+      commonShim.shimRTCIceCandidate(window, browserDetails);
+      commonShim.shimConnectionState(window, browserDetails);
+      commonShim.shimMaxMessageSize(window, browserDetails);
+      commonShim.shimSendThrowTypeError(window, browserDetails);
+      commonShim.removeExtmapAllowMixed(window, browserDetails);
+      break;
+    case 'firefox':
+      if (!firefoxShim || !firefoxShim.shimPeerConnection || !options.shimFirefox) {
+        logging('Firefox shim is not included in this adapter release.');
+        return adapter;
+      }
+      logging('adapter.js shimming firefox.');
+      // Export to the adapter global object visible in the browser.
+      adapter.browserShim = firefoxShim;
+
+      // Must be called before shimPeerConnection.
+      commonShim.shimAddIceCandidateNullOrEmpty(window, browserDetails);
+      commonShim.shimParameterlessSetLocalDescription(window, browserDetails);
+
+      firefoxShim.shimGetUserMedia(window, browserDetails);
+      firefoxShim.shimPeerConnection(window, browserDetails);
+      firefoxShim.shimOnTrack(window, browserDetails);
+      firefoxShim.shimRemoveStream(window, browserDetails);
+      firefoxShim.shimSenderGetStats(window, browserDetails);
+      firefoxShim.shimReceiverGetStats(window, browserDetails);
+      firefoxShim.shimRTCDataChannel(window, browserDetails);
+      firefoxShim.shimAddTransceiver(window, browserDetails);
+      firefoxShim.shimGetParameters(window, browserDetails);
+      firefoxShim.shimCreateOffer(window, browserDetails);
+      firefoxShim.shimCreateAnswer(window, browserDetails);
+
+      commonShim.shimRTCIceCandidate(window, browserDetails);
+      commonShim.shimConnectionState(window, browserDetails);
+      commonShim.shimMaxMessageSize(window, browserDetails);
+      commonShim.shimSendThrowTypeError(window, browserDetails);
+      break;
+    case 'safari':
+      if (!safariShim || !options.shimSafari) {
+        logging('Safari shim is not included in this adapter release.');
+        return adapter;
+      }
+      logging('adapter.js shimming safari.');
+      // Export to the adapter global object visible in the browser.
+      adapter.browserShim = safariShim;
+
+      // Must be called before shimCallbackAPI.
+      commonShim.shimAddIceCandidateNullOrEmpty(window, browserDetails);
+      commonShim.shimParameterlessSetLocalDescription(window, browserDetails);
+
+      safariShim.shimRTCIceServerUrls(window, browserDetails);
+      safariShim.shimCreateOfferLegacy(window, browserDetails);
+      safariShim.shimCallbacksAPI(window, browserDetails);
+      safariShim.shimLocalStreamsAPI(window, browserDetails);
+      safariShim.shimRemoteStreamsAPI(window, browserDetails);
+      safariShim.shimTrackEventTransceiver(window, browserDetails);
+      safariShim.shimGetUserMedia(window, browserDetails);
+      safariShim.shimAudioContext(window, browserDetails);
+
+      commonShim.shimRTCIceCandidate(window, browserDetails);
+      commonShim.shimMaxMessageSize(window, browserDetails);
+      commonShim.shimSendThrowTypeError(window, browserDetails);
+      commonShim.removeExtmapAllowMixed(window, browserDetails);
+      break;
+    default:
+      logging('Unsupported browser!');
+      break;
+  }
+
+  return adapter;
+}
+
+// Browser shims.
+
+},{"./chrome/chrome_shim":3,"./common_shim":6,"./firefox/firefox_shim":7,"./safari/safari_shim":10,"./utils":11,"sdp":12}],3:[function(require,module,exports){
+/*
+ *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+/* eslint-env node */
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.shimGetDisplayMedia = exports.shimGetUserMedia = undefined;
+
+var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
+
+var _getusermedia = require('./getusermedia');
+
+Object.defineProperty(exports, 'shimGetUserMedia', {
+  enumerable: true,
+  get: function get() {
+    return _getusermedia.shimGetUserMedia;
+  }
+});
+
+var _getdisplaymedia = require('./getdisplaymedia');
+
+Object.defineProperty(exports, 'shimGetDisplayMedia', {
+  enumerable: true,
+  get: function get() {
+    return _getdisplaymedia.shimGetDisplayMedia;
+  }
+});
+exports.shimMediaStream = shimMediaStream;
+exports.shimOnTrack = shimOnTrack;
+exports.shimGetSendersWithDtmf = shimGetSendersWithDtmf;
+exports.shimGetStats = shimGetStats;
+exports.shimSenderReceiverGetStats = shimSenderReceiverGetStats;
+exports.shimAddTrackRemoveTrackWithNative = shimAddTrackRemoveTrackWithNative;
+exports.shimAddTrackRemoveTrack = shimAddTrackRemoveTrack;
+exports.shimPeerConnection = shimPeerConnection;
+exports.fixNegotiationNeeded = fixNegotiationNeeded;
+
+var _utils = require('../utils.js');
+
+var utils = _interopRequireWildcard(_utils);
+
+function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }
+
+function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
+
+function shimMediaStream(window) {
+  window.MediaStream = window.MediaStream || window.webkitMediaStream;
+}
+
+function shimOnTrack(window) {
+  if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection && !('ontrack' in window.RTCPeerConnection.prototype)) {
+    Object.defineProperty(window.RTCPeerConnection.prototype, 'ontrack', {
+      get: function get() {
+        return this._ontrack;
+      },
+      set: function set(f) {
+        if (this._ontrack) {
+          this.removeEventListener('track', this._ontrack);
+        }
+        this.addEventListener('track', this._ontrack = f);
+      },
+
+      enumerable: true,
+      configurable: true
+    });
+    var origSetRemoteDescription = window.RTCPeerConnection.prototype.setRemoteDescription;
+    window.RTCPeerConnection.prototype.setRemoteDescription = function setRemoteDescription() {
+      var _this = this;
+
+      if (!this._ontrackpoly) {
+        this._ontrackpoly = function (e) {
+          // onaddstream does not fire when a track is added to an existing
+          // stream. But stream.onaddtrack is implemented so we use that.
+          e.stream.addEventListener('addtrack', function (te) {
+            var receiver = void 0;
+            if (window.RTCPeerConnection.prototype.getReceivers) {
+              receiver = _this.getReceivers().find(function (r) {
+                return r.track && r.track.id === te.track.id;
+              });
+            } else {
+              receiver = { track: te.track };
+            }
+
+            var event = new Event('track');
+            event.track = te.track;
+            event.receiver = receiver;
+            event.transceiver = { receiver: receiver };
+            event.streams = [e.stream];
+            _this.dispatchEvent(event);
+          });
+          e.stream.getTracks().forEach(function (track) {
+            var receiver = void 0;
+            if (window.RTCPeerConnection.prototype.getReceivers) {
+              receiver = _this.getReceivers().find(function (r) {
+                return r.track && r.track.id === track.id;
+              });
+            } else {
+              receiver = { track: track };
+            }
+            var event = new Event('track');
+            event.track = track;
+            event.receiver = receiver;
+            event.transceiver = { receiver: receiver };
+            event.streams = [e.stream];
+            _this.dispatchEvent(event);
+          });
+        };
+        this.addEventListener('addstream', this._ontrackpoly);
+      }
+      return origSetRemoteDescription.apply(this, arguments);
+    };
+  } else {
+    // even if RTCRtpTransceiver is in window, it is only used and
+    // emitted in unified-plan. Unfortunately this means we need
+    // to unconditionally wrap the event.
+    utils.wrapPeerConnectionEvent(window, 'track', function (e) {
+      if (!e.transceiver) {
+        Object.defineProperty(e, 'transceiver', { value: { receiver: e.receiver } });
+      }
+      return e;
+    });
+  }
+}
+
+function shimGetSendersWithDtmf(window) {
+  // Overrides addTrack/removeTrack, depends on shimAddTrackRemoveTrack.
+  if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection && !('getSenders' in window.RTCPeerConnection.prototype) && 'createDTMFSender' in window.RTCPeerConnection.prototype) {
+    var shimSenderWithDtmf = function shimSenderWithDtmf(pc, track) {
+      return {
+        track: track,
+        get dtmf() {
+          if (this._dtmf === undefined) {
+            if (track.kind === 'audio') {
+              this._dtmf = pc.createDTMFSender(track);
+            } else {
+              this._dtmf = null;
+            }
+          }
+          return this._dtmf;
+        },
+        _pc: pc
+      };
+    };
+
+    // augment addTrack when getSenders is not available.
+    if (!window.RTCPeerConnection.prototype.getSenders) {
+      window.RTCPeerConnection.prototype.getSenders = function getSenders() {
+        this._senders = this._senders || [];
+        return this._senders.slice(); // return a copy of the internal state.
+      };
+      var origAddTrack = window.RTCPeerConnection.prototype.addTrack;
+      window.RTCPeerConnection.prototype.addTrack = function addTrack(track, stream) {
+        var sender = origAddTrack.apply(this, arguments);
+        if (!sender) {
+          sender = shimSenderWithDtmf(this, track);
+          this._senders.push(sender);
+        }
+        return sender;
+      };
+
+      var origRemoveTrack = window.RTCPeerConnection.prototype.removeTrack;
+      window.RTCPeerConnection.prototype.removeTrack = function removeTrack(sender) {
+        origRemoveTrack.apply(this, arguments);
+        var idx = this._senders.indexOf(sender);
+        if (idx !== -1) {
+          this._senders.splice(idx, 1);
+        }
+      };
+    }
+    var origAddStream = window.RTCPeerConnection.prototype.addStream;
+    window.RTCPeerConnection.prototype.addStream = function addStream(stream) {
+      var _this2 = this;
+
+      this._senders = this._senders || [];
+      origAddStream.apply(this, [stream]);
+      stream.getTracks().forEach(function (track) {
+        _this2._senders.push(shimSenderWithDtmf(_this2, track));
+      });
+    };
+
+    var origRemoveStream = window.RTCPeerConnection.prototype.removeStream;
+    window.RTCPeerConnection.prototype.removeStream = function removeStream(stream) {
+      var _this3 = this;
+
+      this._senders = this._senders || [];
+      origRemoveStream.apply(this, [stream]);
+
+      stream.getTracks().forEach(function (track) {
+        var sender = _this3._senders.find(function (s) {
+          return s.track === track;
+        });
+        if (sender) {
+          // remove sender
+          _this3._senders.splice(_this3._senders.indexOf(sender), 1);
+        }
+      });
+    };
+  } else if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection && 'getSenders' in window.RTCPeerConnection.prototype && 'createDTMFSender' in window.RTCPeerConnection.prototype && window.RTCRtpSender && !('dtmf' in window.RTCRtpSender.prototype)) {
+    var origGetSenders = window.RTCPeerConnection.prototype.getSenders;
+    window.RTCPeerConnection.prototype.getSenders = function getSenders() {
+      var _this4 = this;
+
+      var senders = origGetSenders.apply(this, []);
+      senders.forEach(function (sender) {
+        return sender._pc = _this4;
+      });
+      return senders;
+    };
+
+    Object.defineProperty(window.RTCRtpSender.prototype, 'dtmf', {
+      get: function get() {
+        if (this._dtmf === undefined) {
+          if (this.track.kind === 'audio') {
+            this._dtmf = this._pc.createDTMFSender(this.track);
+          } else {
+            this._dtmf = null;
+          }
+        }
+        return this._dtmf;
+      }
+    });
+  }
+}
+
+function shimGetStats(window) {
+  if (!window.RTCPeerConnection) {
+    return;
+  }
+
+  var origGetStats = window.RTCPeerConnection.prototype.getStats;
+  window.RTCPeerConnection.prototype.getStats = function getStats() {
+    var _this5 = this;
+
+    var _arguments = Array.prototype.slice.call(arguments),
+        selector = _arguments[0],
+        onSucc = _arguments[1],
+        onErr = _arguments[2];
+
+    // If selector is a function then we are in the old style stats so just
+    // pass back the original getStats format to avoid breaking old users.
+
+
+    if (arguments.length > 0 && typeof selector === 'function') {
+      return origGetStats.apply(this, arguments);
+    }
+
+    // When spec-style getStats is supported, return those when called with
+    // either no arguments or the selector argument is null.
+    if (origGetStats.length === 0 && (arguments.length === 0 || typeof selector !== 'function')) {
+      return origGetStats.apply(this, []);
+    }
+
+    var fixChromeStats_ = function fixChromeStats_(response) {
+      var standardReport = {};
+      var reports = response.result();
+      reports.forEach(function (report) {
+        var standardStats = {
+          id: report.id,
+          timestamp: report.timestamp,
+          type: {
+            localcandidate: 'local-candidate',
+            remotecandidate: 'remote-candidate'
+          }[report.type] || report.type
+        };
+        report.names().forEach(function (name) {
+          standardStats[name] = report.stat(name);
+        });
+        standardReport[standardStats.id] = standardStats;
+      });
+
+      return standardReport;
+    };
+
+    // shim getStats with maplike support
+    var makeMapStats = function makeMapStats(stats) {
+      return new Map(Object.keys(stats).map(function (key) {
+        return [key, stats[key]];
+      }));
+    };
+
+    if (arguments.length >= 2) {
+      var successCallbackWrapper_ = function successCallbackWrapper_(response) {
+        onSucc(makeMapStats(fixChromeStats_(response)));
+      };
+
+      return origGetStats.apply(this, [successCallbackWrapper_, selector]);
+    }
+
+    // promise-support
+    return new Promise(function (resolve, reject) {
+      origGetStats.apply(_this5, [function (response) {
+        resolve(makeMapStats(fixChromeStats_(response)));
+      }, reject]);
+    }).then(onSucc, onErr);
+  };
+}
+
+function shimSenderReceiverGetStats(window) {
+  if (!((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection && window.RTCRtpSender && window.RTCRtpReceiver)) {
+    return;
+  }
+
+  // shim sender stats.
+  if (!('getStats' in window.RTCRtpSender.prototype)) {
+    var origGetSenders = window.RTCPeerConnection.prototype.getSenders;
+    if (origGetSenders) {
+      window.RTCPeerConnection.prototype.getSenders = function getSenders() {
+        var _this6 = this;
+
+        var senders = origGetSenders.apply(this, []);
+        senders.forEach(function (sender) {
+          return sender._pc = _this6;
+        });
+        return senders;
+      };
+    }
+
+    var origAddTrack = window.RTCPeerConnection.prototype.addTrack;
+    if (origAddTrack) {
+      window.RTCPeerConnection.prototype.addTrack = function addTrack() {
+        var sender = origAddTrack.apply(this, arguments);
+        sender._pc = this;
+        return sender;
+      };
+    }
+    window.RTCRtpSender.prototype.getStats = function getStats() {
+      var sender = this;
+      return this._pc.getStats().then(function (result) {
+        return (
+          /* Note: this will include stats of all senders that
+           *   send a track with the same id as sender.track as
+           *   it is not possible to identify the RTCRtpSender.
+           */
+          utils.filterStats(result, sender.track, true)
+        );
+      });
+    };
+  }
+
+  // shim receiver stats.
+  if (!('getStats' in window.RTCRtpReceiver.prototype)) {
+    var origGetReceivers = window.RTCPeerConnection.prototype.getReceivers;
+    if (origGetReceivers) {
+      window.RTCPeerConnection.prototype.getReceivers = function getReceivers() {
+        var _this7 = this;
+
+        var receivers = origGetReceivers.apply(this, []);
+        receivers.forEach(function (receiver) {
+          return receiver._pc = _this7;
+        });
+        return receivers;
+      };
+    }
+    utils.wrapPeerConnectionEvent(window, 'track', function (e) {
+      e.receiver._pc = e.srcElement;
+      return e;
+    });
+    window.RTCRtpReceiver.prototype.getStats = function getStats() {
+      var receiver = this;
+      return this._pc.getStats().then(function (result) {
+        return utils.filterStats(result, receiver.track, false);
+      });
+    };
+  }
+
+  if (!('getStats' in window.RTCRtpSender.prototype && 'getStats' in window.RTCRtpReceiver.prototype)) {
+    return;
+  }
+
+  // shim RTCPeerConnection.getStats(track).
+  var origGetStats = window.RTCPeerConnection.prototype.getStats;
+  window.RTCPeerConnection.prototype.getStats = function getStats() {
+    if (arguments.length > 0 && arguments[0] instanceof window.MediaStreamTrack) {
+      var track = arguments[0];
+      var sender = void 0;
+      var receiver = void 0;
+      var err = void 0;
+      this.getSenders().forEach(function (s) {
+        if (s.track === track) {
+          if (sender) {
+            err = true;
+          } else {
+            sender = s;
+          }
+        }
+      });
+      this.getReceivers().forEach(function (r) {
+        if (r.track === track) {
+          if (receiver) {
+            err = true;
+          } else {
+            receiver = r;
+          }
+        }
+        return r.track === track;
+      });
+      if (err || sender && receiver) {
+        return Promise.reject(new DOMException('There are more than one sender or receiver for the track.', 'InvalidAccessError'));
+      } else if (sender) {
+        return sender.getStats();
+      } else if (receiver) {
+        return receiver.getStats();
+      }
+      return Promise.reject(new DOMException('There is no sender or receiver for the track.', 'InvalidAccessError'));
+    }
+    return origGetStats.apply(this, arguments);
+  };
+}
+
+function shimAddTrackRemoveTrackWithNative(window) {
+  // shim addTrack/removeTrack with native variants in order to make
+  // the interactions with legacy getLocalStreams behave as in other browsers.
+  // Keeps a mapping stream.id => [stream, rtpsenders...]
+  window.RTCPeerConnection.prototype.getLocalStreams = function getLocalStreams() {
+    var _this8 = this;
+
+    this._shimmedLocalStreams = this._shimmedLocalStreams || {};
+    return Object.keys(this._shimmedLocalStreams).map(function (streamId) {
+      return _this8._shimmedLocalStreams[streamId][0];
+    });
+  };
+
+  var origAddTrack = window.RTCPeerConnection.prototype.addTrack;
+  window.RTCPeerConnection.prototype.addTrack = function addTrack(track, stream) {
+    if (!stream) {
+      return origAddTrack.apply(this, arguments);
+    }
+    this._shimmedLocalStreams = this._shimmedLocalStreams || {};
+
+    var sender = origAddTrack.apply(this, arguments);
+    if (!this._shimmedLocalStreams[stream.id]) {
+      this._shimmedLocalStreams[stream.id] = [stream, sender];
+    } else if (this._shimmedLocalStreams[stream.id].indexOf(sender) === -1) {
+      this._shimmedLocalStreams[stream.id].push(sender);
+    }
+    return sender;
+  };
+
+  var origAddStream = window.RTCPeerConnection.prototype.addStream;
+  window.RTCPeerConnection.prototype.addStream = function addStream(stream) {
+    var _this9 = this;
+
+    this._shimmedLocalStreams = this._shimmedLocalStreams || {};
+
+    stream.getTracks().forEach(function (track) {
+      var alreadyExists = _this9.getSenders().find(function (s) {
+        return s.track === track;
+      });
+      if (alreadyExists) {
+        throw new DOMException('Track already exists.', 'InvalidAccessError');
+      }
+    });
+    var existingSenders = this.getSenders();
+    origAddStream.apply(this, arguments);
+    var newSenders = this.getSenders().filter(function (newSender) {
+      return existingSenders.indexOf(newSender) === -1;
+    });
+    this._shimmedLocalStreams[stream.id] = [stream].concat(newSenders);
+  };
+
+  var origRemoveStream = window.RTCPeerConnection.prototype.removeStream;
+  window.RTCPeerConnection.prototype.removeStream = function removeStream(stream) {
+    this._shimmedLocalStreams = this._shimmedLocalStreams || {};
+    delete this._shimmedLocalStreams[stream.id];
+    return origRemoveStream.apply(this, arguments);
+  };
+
+  var origRemoveTrack = window.RTCPeerConnection.prototype.removeTrack;
+  window.RTCPeerConnection.prototype.removeTrack = function removeTrack(sender) {
+    var _this10 = this;
+
+    this._shimmedLocalStreams = this._shimmedLocalStreams || {};
+    if (sender) {
+      Object.keys(this._shimmedLocalStreams).forEach(function (streamId) {
+        var idx = _this10._shimmedLocalStreams[streamId].indexOf(sender);
+        if (idx !== -1) {
+          _this10._shimmedLocalStreams[streamId].splice(idx, 1);
+        }
+        if (_this10._shimmedLocalStreams[streamId].length === 1) {
+          delete _this10._shimmedLocalStreams[streamId];
+        }
+      });
+    }
+    return origRemoveTrack.apply(this, arguments);
+  };
+}
+
+function shimAddTrackRemoveTrack(window, browserDetails) {
+  if (!window.RTCPeerConnection) {
+    return;
+  }
+  // shim addTrack and removeTrack.
+  if (window.RTCPeerConnection.prototype.addTrack && browserDetails.version >= 65) {
+    return shimAddTrackRemoveTrackWithNative(window);
+  }
+
+  // also shim pc.getLocalStreams when addTrack is shimmed
+  // to return the original streams.
+  var origGetLocalStreams = window.RTCPeerConnection.prototype.getLocalStreams;
+  window.RTCPeerConnection.prototype.getLocalStreams = function getLocalStreams() {
+    var _this11 = this;
+
+    var nativeStreams = origGetLocalStreams.apply(this);
+    this._reverseStreams = this._reverseStreams || {};
+    return nativeStreams.map(function (stream) {
+      return _this11._reverseStreams[stream.id];
+    });
+  };
+
+  var origAddStream = window.RTCPeerConnection.prototype.addStream;
+  window.RTCPeerConnection.prototype.addStream = function addStream(stream) {
+    var _this12 = this;
+
+    this._streams = this._streams || {};
+    this._reverseStreams = this._reverseStreams || {};
+
+    stream.getTracks().forEach(function (track) {
+      var alreadyExists = _this12.getSenders().find(function (s) {
+        return s.track === track;
+      });
+      if (alreadyExists) {
+        throw new DOMException('Track already exists.', 'InvalidAccessError');
+      }
+    });
+    // Add identity mapping for consistency with addTrack.
+    // Unless this is being used with a stream from addTrack.
+    if (!this._reverseStreams[stream.id]) {
+      var newStream = new window.MediaStream(stream.getTracks());
+      this._streams[stream.id] = newStream;
+      this._reverseStreams[newStream.id] = stream;
+      stream = newStream;
+    }
+    origAddStream.apply(this, [stream]);
+  };
+
+  var origRemoveStream = window.RTCPeerConnection.prototype.removeStream;
+  window.RTCPeerConnection.prototype.removeStream = function removeStream(stream) {
+    this._streams = this._streams || {};
+    this._reverseStreams = this._reverseStreams || {};
+
+    origRemoveStream.apply(this, [this._streams[stream.id] || stream]);
+    delete this._reverseStreams[this._streams[stream.id] ? this._streams[stream.id].id : stream.id];
+    delete this._streams[stream.id];
+  };
+
+  window.RTCPeerConnection.prototype.addTrack = function addTrack(track, stream) {
+    var _this13 = this;
+
+    if (this.signalingState === 'closed') {
+      throw new DOMException('The RTCPeerConnection\'s signalingState is \'closed\'.', 'InvalidStateError');
+    }
+    var streams = [].slice.call(arguments, 1);
+    if (streams.length !== 1 || !streams[0].getTracks().find(function (t) {
+      return t === track;
+    })) {
+      // this is not fully correct but all we can manage without
+      // [[associated MediaStreams]] internal slot.
+      throw new DOMException('The adapter.js addTrack polyfill only supports a single ' + ' stream which is associated with the specified track.', 'NotSupportedError');
+    }
+
+    var alreadyExists = this.getSenders().find(function (s) {
+      return s.track === track;
+    });
+    if (alreadyExists) {
+      throw new DOMException('Track already exists.', 'InvalidAccessError');
+    }
+
+    this._streams = this._streams || {};
+    this._reverseStreams = this._reverseStreams || {};
+    var oldStream = this._streams[stream.id];
+    if (oldStream) {
+      // this is using odd Chrome behaviour, use with caution:
+      // https://bugs.chromium.org/p/webrtc/issues/detail?id=7815
+      // Note: we rely on the high-level addTrack/dtmf shim to
+      // create the sender with a dtmf sender.
+      oldStream.addTrack(track);
+
+      // Trigger ONN async.
+      Promise.resolve().then(function () {
+        _this13.dispatchEvent(new Event('negotiationneeded'));
+      });
+    } else {
+      var newStream = new window.MediaStream([track]);
+      this._streams[stream.id] = newStream;
+      this._reverseStreams[newStream.id] = stream;
+      this.addStream(newStream);
+    }
+    return this.getSenders().find(function (s) {
+      return s.track === track;
+    });
+  };
+
+  // replace the internal stream id with the external one and
+  // vice versa.
+  function replaceInternalStreamId(pc, description) {
+    var sdp = description.sdp;
+    Object.keys(pc._reverseStreams || []).forEach(function (internalId) {
+      var externalStream = pc._reverseStreams[internalId];
+      var internalStream = pc._streams[externalStream.id];
+      sdp = sdp.replace(new RegExp(internalStream.id, 'g'), externalStream.id);
+    });
+    return new RTCSessionDescription({
+      type: description.type,
+      sdp: sdp
+    });
+  }
+  function replaceExternalStreamId(pc, description) {
+    var sdp = description.sdp;
+    Object.keys(pc._reverseStreams || []).forEach(function (internalId) {
+      var externalStream = pc._reverseStreams[internalId];
+      var internalStream = pc._streams[externalStream.id];
+      sdp = sdp.replace(new RegExp(externalStream.id, 'g'), internalStream.id);
+    });
+    return new RTCSessionDescription({
+      type: description.type,
+      sdp: sdp
+    });
+  }
+  ['createOffer', 'createAnswer'].forEach(function (method) {
+    var nativeMethod = window.RTCPeerConnection.prototype[method];
+    var methodObj = _defineProperty({}, method, function () {
+      var _this14 = this;
+
+      var args = arguments;
+      var isLegacyCall = arguments.length && typeof arguments[0] === 'function';
+      if (isLegacyCall) {
+        return nativeMethod.apply(this, [function (description) {
+          var desc = replaceInternalStreamId(_this14, description);
+          args[0].apply(null, [desc]);
+        }, function (err) {
+          if (args[1]) {
+            args[1].apply(null, err);
+          }
+        }, arguments[2]]);
+      }
+      return nativeMethod.apply(this, arguments).then(function (description) {
+        return replaceInternalStreamId(_this14, description);
+      });
+    });
+    window.RTCPeerConnection.prototype[method] = methodObj[method];
+  });
+
+  var origSetLocalDescription = window.RTCPeerConnection.prototype.setLocalDescription;
+  window.RTCPeerConnection.prototype.setLocalDescription = function setLocalDescription() {
+    if (!arguments.length || !arguments[0].type) {
+      return origSetLocalDescription.apply(this, arguments);
+    }
+    arguments[0] = replaceExternalStreamId(this, arguments[0]);
+    return origSetLocalDescription.apply(this, arguments);
+  };
+
+  // TODO: mangle getStats: https://w3c.github.io/webrtc-stats/#dom-rtcmediastreamstats-streamidentifier
+
+  var origLocalDescription = Object.getOwnPropertyDescriptor(window.RTCPeerConnection.prototype, 'localDescription');
+  Object.defineProperty(window.RTCPeerConnection.prototype, 'localDescription', {
+    get: function get() {
+      var description = origLocalDescription.get.apply(this);
+      if (description.type === '') {
+        return description;
+      }
+      return replaceInternalStreamId(this, description);
+    }
+  });
+
+  window.RTCPeerConnection.prototype.removeTrack = function removeTrack(sender) {
+    var _this15 = this;
+
+    if (this.signalingState === 'closed') {
+      throw new DOMException('The RTCPeerConnection\'s signalingState is \'closed\'.', 'InvalidStateError');
+    }
+    // We can not yet check for sender instanceof RTCRtpSender
+    // since we shim RTPSender. So we check if sender._pc is set.
+    if (!sender._pc) {
+      throw new DOMException('Argument 1 of RTCPeerConnection.removeTrack ' + 'does not implement interface RTCRtpSender.', 'TypeError');
+    }
+    var isLocal = sender._pc === this;
+    if (!isLocal) {
+      throw new DOMException('Sender was not created by this connection.', 'InvalidAccessError');
+    }
+
+    // Search for the native stream the senders track belongs to.
+    this._streams = this._streams || {};
+    var stream = void 0;
+    Object.keys(this._streams).forEach(function (streamid) {
+      var hasTrack = _this15._streams[streamid].getTracks().find(function (track) {
+        return sender.track === track;
+      });
+      if (hasTrack) {
+        stream = _this15._streams[streamid];
+      }
+    });
+
+    if (stream) {
+      if (stream.getTracks().length === 1) {
+        // if this is the last track of the stream, remove the stream. This
+        // takes care of any shimmed _senders.
+        this.removeStream(this._reverseStreams[stream.id]);
+      } else {
+        // relying on the same odd chrome behaviour as above.
+        stream.removeTrack(sender.track);
+      }
+      this.dispatchEvent(new Event('negotiationneeded'));
+    }
+  };
+}
+
+function shimPeerConnection(window, browserDetails) {
+  if (!window.RTCPeerConnection && window.webkitRTCPeerConnection) {
+    // very basic support for old versions.
+    window.RTCPeerConnection = window.webkitRTCPeerConnection;
+  }
+  if (!window.RTCPeerConnection) {
+    return;
+  }
+
+  // shim implicit creation of RTCSessionDescription/RTCIceCandidate
+  if (browserDetails.version < 53) {
+    ['setLocalDescription', 'setRemoteDescription', 'addIceCandidate'].forEach(function (method) {
+      var nativeMethod = window.RTCPeerConnection.prototype[method];
+      var methodObj = _defineProperty({}, method, function () {
+        arguments[0] = new (method === 'addIceCandidate' ? window.RTCIceCandidate : window.RTCSessionDescription)(arguments[0]);
+        return nativeMethod.apply(this, arguments);
+      });
+      window.RTCPeerConnection.prototype[method] = methodObj[method];
+    });
+  }
+}
+
+// Attempt to fix ONN in plan-b mode.
+function fixNegotiationNeeded(window, browserDetails) {
+  utils.wrapPeerConnectionEvent(window, 'negotiationneeded', function (e) {
+    var pc = e.target;
+    if (browserDetails.version < 72 || pc.getConfiguration && pc.getConfiguration().sdpSemantics === 'plan-b') {
+      if (pc.signalingState !== 'stable') {
+        return;
+      }
+    }
+    return e;
+  });
+}
+
+},{"../utils.js":11,"./getdisplaymedia":4,"./getusermedia":5}],4:[function(require,module,exports){
+/*
+ *  Copyright (c) 2018 The adapter.js project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+/* eslint-env node */
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.shimGetDisplayMedia = shimGetDisplayMedia;
+function shimGetDisplayMedia(window, getSourceId) {
+  if (window.navigator.mediaDevices && 'getDisplayMedia' in window.navigator.mediaDevices) {
+    return;
+  }
+  if (!window.navigator.mediaDevices) {
+    return;
+  }
+  // getSourceId is a function that returns a promise resolving with
+  // the sourceId of the screen/window/tab to be shared.
+  if (typeof getSourceId !== 'function') {
+    console.error('shimGetDisplayMedia: getSourceId argument is not ' + 'a function');
+    return;
+  }
+  window.navigator.mediaDevices.getDisplayMedia = function getDisplayMedia(constraints) {
+    return getSourceId(constraints).then(function (sourceId) {
+      var widthSpecified = constraints.video && constraints.video.width;
+      var heightSpecified = constraints.video && constraints.video.height;
+      var frameRateSpecified = constraints.video && constraints.video.frameRate;
+      constraints.video = {
+        mandatory: {
+          chromeMediaSource: 'desktop',
+          chromeMediaSourceId: sourceId,
+          maxFrameRate: frameRateSpecified || 3
+        }
+      };
+      if (widthSpecified) {
+        constraints.video.mandatory.maxWidth = widthSpecified;
+      }
+      if (heightSpecified) {
+        constraints.video.mandatory.maxHeight = heightSpecified;
+      }
+      return window.navigator.mediaDevices.getUserMedia(constraints);
+    });
+  };
+}
+
+},{}],5:[function(require,module,exports){
+/*
+ *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+/* eslint-env node */
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+
+var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
+
+exports.shimGetUserMedia = shimGetUserMedia;
+
+var _utils = require('../utils.js');
+
+var utils = _interopRequireWildcard(_utils);
+
+function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }
+
+var logging = utils.log;
+
+function shimGetUserMedia(window, browserDetails) {
+  var navigator = window && window.navigator;
+
+  if (!navigator.mediaDevices) {
+    return;
+  }
+
+  var constraintsToChrome_ = function constraintsToChrome_(c) {
+    if ((typeof c === 'undefined' ? 'undefined' : _typeof(c)) !== 'object' || c.mandatory || c.optional) {
+      return c;
+    }
+    var cc = {};
+    Object.keys(c).forEach(function (key) {
+      if (key === 'require' || key === 'advanced' || key === 'mediaSource') {
+        return;
+      }
+      var r = _typeof(c[key]) === 'object' ? c[key] : { ideal: c[key] };
+      if (r.exact !== undefined && typeof r.exact === 'number') {
+        r.min = r.max = r.exact;
+      }
+      var oldname_ = function oldname_(prefix, name) {
+        if (prefix) {
+          return prefix + name.charAt(0).toUpperCase() + name.slice(1);
+        }
+        return name === 'deviceId' ? 'sourceId' : name;
+      };
+      if (r.ideal !== undefined) {
+        cc.optional = cc.optional || [];
+        var oc = {};
+        if (typeof r.ideal === 'number') {
+          oc[oldname_('min', key)] = r.ideal;
+          cc.optional.push(oc);
+          oc = {};
+          oc[oldname_('max', key)] = r.ideal;
+          cc.optional.push(oc);
+        } else {
+          oc[oldname_('', key)] = r.ideal;
+          cc.optional.push(oc);
+        }
+      }
+      if (r.exact !== undefined && typeof r.exact !== 'number') {
+        cc.mandatory = cc.mandatory || {};
+        cc.mandatory[oldname_('', key)] = r.exact;
+      } else {
+        ['min', 'max'].forEach(function (mix) {
+          if (r[mix] !== undefined) {
+            cc.mandatory = cc.mandatory || {};
+            cc.mandatory[oldname_(mix, key)] = r[mix];
+          }
+        });
+      }
+    });
+    if (c.advanced) {
+      cc.optional = (cc.optional || []).concat(c.advanced);
+    }
+    return cc;
+  };
+
+  var shimConstraints_ = function shimConstraints_(constraints, func) {
+    if (browserDetails.version >= 61) {
+      return func(constraints);
+    }
+    constraints = JSON.parse(JSON.stringify(constraints));
+    if (constraints && _typeof(constraints.audio) === 'object') {
+      var remap = function remap(obj, a, b) {
+        if (a in obj && !(b in obj)) {
+          obj[b] = obj[a];
+          delete obj[a];
+        }
+      };
+      constraints = JSON.parse(JSON.stringify(constraints));
+      remap(constraints.audio, 'autoGainControl', 'googAutoGainControl');
+      remap(constraints.audio, 'noiseSuppression', 'googNoiseSuppression');
+      constraints.audio = constraintsToChrome_(constraints.audio);
+    }
+    if (constraints && _typeof(constraints.video) === 'object') {
+      // Shim facingMode for mobile & surface pro.
+      var face = constraints.video.facingMode;
+      face = face && ((typeof face === 'undefined' ? 'undefined' : _typeof(face)) === 'object' ? face : { ideal: face });
+      var getSupportedFacingModeLies = browserDetails.version < 66;
+
+      if (face && (face.exact === 'user' || face.exact === 'environment' || face.ideal === 'user' || face.ideal === 'environment') && !(navigator.mediaDevices.getSupportedConstraints && navigator.mediaDevices.getSupportedConstraints().facingMode && !getSupportedFacingModeLies)) {
+        delete constraints.video.facingMode;
+        var matches = void 0;
+        if (face.exact === 'environment' || face.ideal === 'environment') {
+          matches = ['back', 'rear'];
+        } else if (face.exact === 'user' || face.ideal === 'user') {
+          matches = ['front'];
+        }
+        if (matches) {
+          // Look for matches in label, or use last cam for back (typical).
+          return navigator.mediaDevices.enumerateDevices().then(function (devices) {
+            devices = devices.filter(function (d) {
+              return d.kind === 'videoinput';
+            });
+            var dev = devices.find(function (d) {
+              return matches.some(function (match) {
+                return d.label.toLowerCase().includes(match);
+              });
+            });
+            if (!dev && devices.length && matches.includes('back')) {
+              dev = devices[devices.length - 1]; // more likely the back cam
+            }
+            if (dev) {
+              constraints.video.deviceId = face.exact ? { exact: dev.deviceId } : { ideal: dev.deviceId };
+            }
+            constraints.video = constraintsToChrome_(constraints.video);
+            logging('chrome: ' + JSON.stringify(constraints));
+            return func(constraints);
+          });
+        }
+      }
+      constraints.video = constraintsToChrome_(constraints.video);
+    }
+    logging('chrome: ' + JSON.stringify(constraints));
+    return func(constraints);
+  };
+
+  var shimError_ = function shimError_(e) {
+    if (browserDetails.version >= 64) {
+      return e;
+    }
+    return {
+      name: {
+        PermissionDeniedError: 'NotAllowedError',
+        PermissionDismissedError: 'NotAllowedError',
+        InvalidStateError: 'NotAllowedError',
+        DevicesNotFoundError: 'NotFoundError',
+        ConstraintNotSatisfiedError: 'OverconstrainedError',
+        TrackStartError: 'NotReadableError',
+        MediaDeviceFailedDueToShutdown: 'NotAllowedError',
+        MediaDeviceKillSwitchOn: 'NotAllowedError',
+        TabCaptureError: 'AbortError',
+        ScreenCaptureError: 'AbortError',
+        DeviceCaptureError: 'AbortError'
+      }[e.name] || e.name,
+      message: e.message,
+      constraint: e.constraint || e.constraintName,
+      toString: function toString() {
+        return this.name + (this.message && ': ') + this.message;
+      }
+    };
+  };
+
+  var getUserMedia_ = function getUserMedia_(constraints, onSuccess, onError) {
+    shimConstraints_(constraints, function (c) {
+      navigator.webkitGetUserMedia(c, onSuccess, function (e) {
+        if (onError) {
+          onError(shimError_(e));
+        }
+      });
+    });
+  };
+  navigator.getUserMedia = getUserMedia_.bind(navigator);
+
+  // Even though Chrome 45 has navigator.mediaDevices and a getUserMedia
+  // function which returns a Promise, it does not accept spec-style
+  // constraints.
+  if (navigator.mediaDevices.getUserMedia) {
+    var origGetUserMedia = navigator.mediaDevices.getUserMedia.bind(navigator.mediaDevices);
+    navigator.mediaDevices.getUserMedia = function (cs) {
+      return shimConstraints_(cs, function (c) {
+        return origGetUserMedia(c).then(function (stream) {
+          if (c.audio && !stream.getAudioTracks().length || c.video && !stream.getVideoTracks().length) {
+            stream.getTracks().forEach(function (track) {
+              track.stop();
+            });
+            throw new DOMException('', 'NotFoundError');
+          }
+          return stream;
+        }, function (e) {
+          return Promise.reject(shimError_(e));
+        });
+      });
+    };
+  }
+}
+
+},{"../utils.js":11}],6:[function(require,module,exports){
+/*
+ *  Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+/* eslint-env node */
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+
+var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
+
+exports.shimRTCIceCandidate = shimRTCIceCandidate;
+exports.shimMaxMessageSize = shimMaxMessageSize;
+exports.shimSendThrowTypeError = shimSendThrowTypeError;
+exports.shimConnectionState = shimConnectionState;
+exports.removeExtmapAllowMixed = removeExtmapAllowMixed;
+exports.shimAddIceCandidateNullOrEmpty = shimAddIceCandidateNullOrEmpty;
+exports.shimParameterlessSetLocalDescription = shimParameterlessSetLocalDescription;
+
+var _sdp = require('sdp');
+
+var _sdp2 = _interopRequireDefault(_sdp);
+
+var _utils = require('./utils');
+
+var utils = _interopRequireWildcard(_utils);
+
+function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+function shimRTCIceCandidate(window) {
+  // foundation is arbitrarily chosen as an indicator for full support for
+  // https://w3c.github.io/webrtc-pc/#rtcicecandidate-interface
+  if (!window.RTCIceCandidate || window.RTCIceCandidate && 'foundation' in window.RTCIceCandidate.prototype) {
+    return;
+  }
+
+  var NativeRTCIceCandidate = window.RTCIceCandidate;
+  window.RTCIceCandidate = function RTCIceCandidate(args) {
+    // Remove the a= which shouldn't be part of the candidate string.
+    if ((typeof args === 'undefined' ? 'undefined' : _typeof(args)) === 'object' && args.candidate && args.candidate.indexOf('a=') === 0) {
+      args = JSON.parse(JSON.stringify(args));
+      args.candidate = args.candidate.substr(2);
+    }
+
+    if (args.candidate && args.candidate.length) {
+      // Augment the native candidate with the parsed fields.
+      var nativeCandidate = new NativeRTCIceCandidate(args);
+      var parsedCandidate = _sdp2.default.parseCandidate(args.candidate);
+      var augmentedCandidate = Object.assign(nativeCandidate, parsedCandidate);
+
+      // Add a serializer that does not serialize the extra attributes.
+      augmentedCandidate.toJSON = function toJSON() {
+        return {
+          candidate: augmentedCandidate.candidate,
+          sdpMid: augmentedCandidate.sdpMid,
+          sdpMLineIndex: augmentedCandidate.sdpMLineIndex,
+          usernameFragment: augmentedCandidate.usernameFragment
+        };
+      };
+      return augmentedCandidate;
+    }
+    return new NativeRTCIceCandidate(args);
+  };
+  window.RTCIceCandidate.prototype = NativeRTCIceCandidate.prototype;
+
+  // Hook up the augmented candidate in onicecandidate and
+  // addEventListener('icecandidate', ...)
+  utils.wrapPeerConnectionEvent(window, 'icecandidate', function (e) {
+    if (e.candidate) {
+      Object.defineProperty(e, 'candidate', {
+        value: new window.RTCIceCandidate(e.candidate),
+        writable: 'false'
+      });
+    }
+    return e;
+  });
+}
+
+function shimMaxMessageSize(window, browserDetails) {
+  if (!window.RTCPeerConnection) {
+    return;
+  }
+
+  if (!('sctp' in window.RTCPeerConnection.prototype)) {
+    Object.defineProperty(window.RTCPeerConnection.prototype, 'sctp', {
+      get: function get() {
+        return typeof this._sctp === 'undefined' ? null : this._sctp;
+      }
+    });
+  }
+
+  var sctpInDescription = function sctpInDescription(description) {
+    if (!description || !description.sdp) {
+      return false;
+    }
+    var sections = _sdp2.default.splitSections(description.sdp);
+    sections.shift();
+    return sections.some(function (mediaSection) {
+      var mLine = _sdp2.default.parseMLine(mediaSection);
+      return mLine && mLine.kind === 'application' && mLine.protocol.indexOf('SCTP') !== -1;
+    });
+  };
+
+  var getRemoteFirefoxVersion = function getRemoteFirefoxVersion(description) {
+    // TODO: Is there a better solution for detecting Firefox?
+    var match = description.sdp.match(/mozilla...THIS_IS_SDPARTA-(\d+)/);
+    if (match === null || match.length < 2) {
+      return -1;
+    }
+    var version = parseInt(match[1], 10);
+    // Test for NaN (yes, this is ugly)
+    return version !== version ? -1 : version;
+  };
+
+  var getCanSendMaxMessageSize = function getCanSendMaxMessageSize(remoteIsFirefox) {
+    // Every implementation we know can send at least 64 KiB.
+    // Note: Although Chrome is technically able to send up to 256 KiB, the
+    //       data does not reach the other peer reliably.
+    //       See: https://bugs.chromium.org/p/webrtc/issues/detail?id=8419
+    var canSendMaxMessageSize = 65536;
+    if (browserDetails.browser === 'firefox') {
+      if (browserDetails.version < 57) {
+        if (remoteIsFirefox === -1) {
+          // FF < 57 will send in 16 KiB chunks using the deprecated PPID
+          // fragmentation.
+          canSendMaxMessageSize = 16384;
+        } else {
+          // However, other FF (and RAWRTC) can reassemble PPID-fragmented
+          // messages. Thus, supporting ~2 GiB when sending.
+          canSendMaxMessageSize = 2147483637;
+        }
+      } else if (browserDetails.version < 60) {
+        // Currently, all FF >= 57 will reset the remote maximum message size
+        // to the default value when a data channel is created at a later
+        // stage. :(
+        // See: https://bugzilla.mozilla.org/show_bug.cgi?id=1426831
+        canSendMaxMessageSize = browserDetails.version === 57 ? 65535 : 65536;
+      } else {
+        // FF >= 60 supports sending ~2 GiB
+        canSendMaxMessageSize = 2147483637;
+      }
+    }
+    return canSendMaxMessageSize;
+  };
+
+  var getMaxMessageSize = function getMaxMessageSize(description, remoteIsFirefox) {
+    // Note: 65536 bytes is the default value from the SDP spec. Also,
+    //       every implementation we know supports receiving 65536 bytes.
+    var maxMessageSize = 65536;
+
+    // FF 57 has a slightly incorrect default remote max message size, so
+    // we need to adjust it here to avoid a failure when sending.
+    // See: https://bugzilla.mozilla.org/show_bug.cgi?id=1425697
+    if (browserDetails.browser === 'firefox' && browserDetails.version === 57) {
+      maxMessageSize = 65535;
+    }
+
+    var match = _sdp2.default.matchPrefix(description.sdp, 'a=max-message-size:');
+    if (match.length > 0) {
+      maxMessageSize = parseInt(match[0].substr(19), 10);
+    } else if (browserDetails.browser === 'firefox' && remoteIsFirefox !== -1) {
+      // If the maximum message size is not present in the remote SDP and
+      // both local and remote are Firefox, the remote peer can receive
+      // ~2 GiB.
+      maxMessageSize = 2147483637;
+    }
+    return maxMessageSize;
+  };
+
+  var origSetRemoteDescription = window.RTCPeerConnection.prototype.setRemoteDescription;
+  window.RTCPeerConnection.prototype.setRemoteDescription = function setRemoteDescription() {
+    this._sctp = null;
+    // Chrome decided to not expose .sctp in plan-b mode.
+    // As usual, adapter.js has to do an 'ugly worakaround'
+    // to cover up the mess.
+    if (browserDetails.browser === 'chrome' && browserDetails.version >= 76) {
+      var _getConfiguration = this.getConfiguration(),
+          sdpSemantics = _getConfiguration.sdpSemantics;
+
+      if (sdpSemantics === 'plan-b') {
+        Object.defineProperty(this, 'sctp', {
+          get: function get() {
+            return typeof this._sctp === 'undefined' ? null : this._sctp;
+          },
+
+          enumerable: true,
+          configurable: true
+        });
+      }
+    }
+
+    if (sctpInDescription(arguments[0])) {
+      // Check if the remote is FF.
+      var isFirefox = getRemoteFirefoxVersion(arguments[0]);
+
+      // Get the maximum message size the local peer is capable of sending
+      var canSendMMS = getCanSendMaxMessageSize(isFirefox);
+
+      // Get the maximum message size of the remote peer.
+      var remoteMMS = getMaxMessageSize(arguments[0], isFirefox);
+
+      // Determine final maximum message size
+      var maxMessageSize = void 0;
+      if (canSendMMS === 0 && remoteMMS === 0) {
+        maxMessageSize = Number.POSITIVE_INFINITY;
+      } else if (canSendMMS === 0 || remoteMMS === 0) {
+        maxMessageSize = Math.max(canSendMMS, remoteMMS);
+      } else {
+        maxMessageSize = Math.min(canSendMMS, remoteMMS);
+      }
+
+      // Create a dummy RTCSctpTransport object and the 'maxMessageSize'
+      // attribute.
+      var sctp = {};
+      Object.defineProperty(sctp, 'maxMessageSize', {
+        get: function get() {
+          return maxMessageSize;
+        }
+      });
+      this._sctp = sctp;
+    }
+
+    return origSetRemoteDescription.apply(this, arguments);
+  };
+}
+
+function shimSendThrowTypeError(window) {
+  if (!(window.RTCPeerConnection && 'createDataChannel' in window.RTCPeerConnection.prototype)) {
+    return;
+  }
+
+  // Note: Although Firefox >= 57 has a native implementation, the maximum
+  //       message size can be reset for all data channels at a later stage.
+  //       See: https://bugzilla.mozilla.org/show_bug.cgi?id=1426831
+
+  function wrapDcSend(dc, pc) {
+    var origDataChannelSend = dc.send;
+    dc.send = function send() {
+      var data = arguments[0];
+      var length = data.length || data.size || data.byteLength;
+      if (dc.readyState === 'open' && pc.sctp && length > pc.sctp.maxMessageSize) {
+        throw new TypeError('Message too large (can send a maximum of ' + pc.sctp.maxMessageSize + ' bytes)');
+      }
+      return origDataChannelSend.apply(dc, arguments);
+    };
+  }
+  var origCreateDataChannel = window.RTCPeerConnection.prototype.createDataChannel;
+  window.RTCPeerConnection.prototype.createDataChannel = function createDataChannel() {
+    var dataChannel = origCreateDataChannel.apply(this, arguments);
+    wrapDcSend(dataChannel, this);
+    return dataChannel;
+  };
+  utils.wrapPeerConnectionEvent(window, 'datachannel', function (e) {
+    wrapDcSend(e.channel, e.target);
+    return e;
+  });
+}
+
+/* shims RTCConnectionState by pretending it is the same as iceConnectionState.
+ * See https://bugs.chromium.org/p/webrtc/issues/detail?id=6145#c12
+ * for why this is a valid hack in Chrome. In Firefox it is slightly incorrect
+ * since DTLS failures would be hidden. See
+ * https://bugzilla.mozilla.org/show_bug.cgi?id=1265827
+ * for the Firefox tracking bug.
+ */
+function shimConnectionState(window) {
+  if (!window.RTCPeerConnection || 'connectionState' in window.RTCPeerConnection.prototype) {
+    return;
+  }
+  var proto = window.RTCPeerConnection.prototype;
+  Object.defineProperty(proto, 'connectionState', {
+    get: function get() {
+      return {
+        completed: 'connected',
+        checking: 'connecting'
+      }[this.iceConnectionState] || this.iceConnectionState;
+    },
+
+    enumerable: true,
+    configurable: true
+  });
+  Object.defineProperty(proto, 'onconnectionstatechange', {
+    get: function get() {
+      return this._onconnectionstatechange || null;
+    },
+    set: function set(cb) {
+      if (this._onconnectionstatechange) {
+        this.removeEventListener('connectionstatechange', this._onconnectionstatechange);
+        delete this._onconnectionstatechange;
+      }
+      if (cb) {
+        this.addEventListener('connectionstatechange', this._onconnectionstatechange = cb);
+      }
+    },
+
+    enumerable: true,
+    configurable: true
+  });
+
+  ['setLocalDescription', 'setRemoteDescription'].forEach(function (method) {
+    var origMethod = proto[method];
+    proto[method] = function () {
+      if (!this._connectionstatechangepoly) {
+        this._connectionstatechangepoly = function (e) {
+          var pc = e.target;
+          if (pc._lastConnectionState !== pc.connectionState) {
+            pc._lastConnectionState = pc.connectionState;
+            var newEvent = new Event('connectionstatechange', e);
+            pc.dispatchEvent(newEvent);
+          }
+          return e;
+        };
+        this.addEventListener('iceconnectionstatechange', this._connectionstatechangepoly);
+      }
+      return origMethod.apply(this, arguments);
+    };
+  });
+}
+
+function removeExtmapAllowMixed(window, browserDetails) {
+  /* remove a=extmap-allow-mixed for webrtc.org < M71 */
+  if (!window.RTCPeerConnection) {
+    return;
+  }
+  if (browserDetails.browser === 'chrome' && browserDetails.version >= 71) {
+    return;
+  }
+  if (browserDetails.browser === 'safari' && browserDetails.version >= 605) {
+    return;
+  }
+  var nativeSRD = window.RTCPeerConnection.prototype.setRemoteDescription;
+  window.RTCPeerConnection.prototype.setRemoteDescription = function setRemoteDescription(desc) {
+    if (desc && desc.sdp && desc.sdp.indexOf('\na=extmap-allow-mixed') !== -1) {
+      var sdp = desc.sdp.split('\n').filter(function (line) {
+        return line.trim() !== 'a=extmap-allow-mixed';
+      }).join('\n');
+      // Safari enforces read-only-ness of RTCSessionDescription fields.
+      if (window.RTCSessionDescription && desc instanceof window.RTCSessionDescription) {
+        arguments[0] = new window.RTCSessionDescription({
+          type: desc.type,
+          sdp: sdp
+        });
+      } else {
+        desc.sdp = sdp;
+      }
+    }
+    return nativeSRD.apply(this, arguments);
+  };
+}
+
+function shimAddIceCandidateNullOrEmpty(window, browserDetails) {
+  // Support for addIceCandidate(null or undefined)
+  // as well as addIceCandidate({candidate: "", ...})
+  // https://bugs.chromium.org/p/chromium/issues/detail?id=978582
+  // Note: must be called before other polyfills which change the signature.
+  if (!(window.RTCPeerConnection && window.RTCPeerConnection.prototype)) {
+    return;
+  }
+  var nativeAddIceCandidate = window.RTCPeerConnection.prototype.addIceCandidate;
+  if (!nativeAddIceCandidate || nativeAddIceCandidate.length === 0) {
+    return;
+  }
+  window.RTCPeerConnection.prototype.addIceCandidate = function addIceCandidate() {
+    if (!arguments[0]) {
+      if (arguments[1]) {
+        arguments[1].apply(null);
+      }
+      return Promise.resolve();
+    }
+    // Firefox 68+ emits and processes {candidate: "", ...}, ignore
+    // in older versions.
+    // Native support for ignoring exists for Chrome M77+.
+    // Safari ignores as well, exact version unknown but works in the same
+    // version that also ignores addIceCandidate(null).
+    if ((browserDetails.browser === 'chrome' && browserDetails.version < 78 || browserDetails.browser === 'firefox' && browserDetails.version < 68 || browserDetails.browser === 'safari') && arguments[0] && arguments[0].candidate === '') {
+      return Promise.resolve();
+    }
+    return nativeAddIceCandidate.apply(this, arguments);
+  };
+}
+
+// Note: Make sure to call this ahead of APIs that modify
+// setLocalDescription.length
+function shimParameterlessSetLocalDescription(window, browserDetails) {
+  if (!(window.RTCPeerConnection && window.RTCPeerConnection.prototype)) {
+    return;
+  }
+  var nativeSetLocalDescription = window.RTCPeerConnection.prototype.setLocalDescription;
+  if (!nativeSetLocalDescription || nativeSetLocalDescription.length === 0) {
+    return;
+  }
+  window.RTCPeerConnection.prototype.setLocalDescription = function setLocalDescription() {
+    var _this = this;
+
+    var desc = arguments[0] || {};
+    if ((typeof desc === 'undefined' ? 'undefined' : _typeof(desc)) !== 'object' || desc.type && desc.sdp) {
+      return nativeSetLocalDescription.apply(this, arguments);
+    }
+    // The remaining steps should technically happen when SLD comes off the
+    // RTCPeerConnection's operations chain (not ahead of going on it), but
+    // this is too difficult to shim. Instead, this shim only covers the
+    // common case where the operations chain is empty. This is imperfect, but
+    // should cover many cases. Rationale: Even if we can't reduce the glare
+    // window to zero on imperfect implementations, there's value in tapping
+    // into the perfect negotiation pattern that several browsers support.
+    desc = { type: desc.type, sdp: desc.sdp };
+    if (!desc.type) {
+      switch (this.signalingState) {
+        case 'stable':
+        case 'have-local-offer':
+        case 'have-remote-pranswer':
+          desc.type = 'offer';
+          break;
+        default:
+          desc.type = 'answer';
+          break;
+      }
+    }
+    if (desc.sdp || desc.type !== 'offer' && desc.type !== 'answer') {
+      return nativeSetLocalDescription.apply(this, [desc]);
+    }
+    var func = desc.type === 'offer' ? this.createOffer : this.createAnswer;
+    return func.apply(this).then(function (d) {
+      return nativeSetLocalDescription.apply(_this, [d]);
+    });
+  };
+}
+
+},{"./utils":11,"sdp":12}],7:[function(require,module,exports){
+/*
+ *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+/* eslint-env node */
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.shimGetDisplayMedia = exports.shimGetUserMedia = undefined;
+
+var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
+
+var _getusermedia = require('./getusermedia');
+
+Object.defineProperty(exports, 'shimGetUserMedia', {
+  enumerable: true,
+  get: function get() {
+    return _getusermedia.shimGetUserMedia;
+  }
+});
+
+var _getdisplaymedia = require('./getdisplaymedia');
+
+Object.defineProperty(exports, 'shimGetDisplayMedia', {
+  enumerable: true,
+  get: function get() {
+    return _getdisplaymedia.shimGetDisplayMedia;
+  }
+});
+exports.shimOnTrack = shimOnTrack;
+exports.shimPeerConnection = shimPeerConnection;
+exports.shimSenderGetStats = shimSenderGetStats;
+exports.shimReceiverGetStats = shimReceiverGetStats;
+exports.shimRemoveStream = shimRemoveStream;
+exports.shimRTCDataChannel = shimRTCDataChannel;
+exports.shimAddTransceiver = shimAddTransceiver;
+exports.shimGetParameters = shimGetParameters;
+exports.shimCreateOffer = shimCreateOffer;
+exports.shimCreateAnswer = shimCreateAnswer;
+
+var _utils = require('../utils');
+
+var utils = _interopRequireWildcard(_utils);
+
+function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }
+
+function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
+
+function shimOnTrack(window) {
+  if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCTrackEvent && 'receiver' in window.RTCTrackEvent.prototype && !('transceiver' in window.RTCTrackEvent.prototype)) {
+    Object.defineProperty(window.RTCTrackEvent.prototype, 'transceiver', {
+      get: function get() {
+        return { receiver: this.receiver };
+      }
+    });
+  }
+}
+
+function shimPeerConnection(window, browserDetails) {
+  if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) !== 'object' || !(window.RTCPeerConnection || window.mozRTCPeerConnection)) {
+    return; // probably media.peerconnection.enabled=false in about:config
+  }
+  if (!window.RTCPeerConnection && window.mozRTCPeerConnection) {
+    // very basic support for old versions.
+    window.RTCPeerConnection = window.mozRTCPeerConnection;
+  }
+
+  if (browserDetails.version < 53) {
+    // shim away need for obsolete RTCIceCandidate/RTCSessionDescription.
+    ['setLocalDescription', 'setRemoteDescription', 'addIceCandidate'].forEach(function (method) {
+      var nativeMethod = window.RTCPeerConnection.prototype[method];
+      var methodObj = _defineProperty({}, method, function () {
+        arguments[0] = new (method === 'addIceCandidate' ? window.RTCIceCandidate : window.RTCSessionDescription)(arguments[0]);
+        return nativeMethod.apply(this, arguments);
+      });
+      window.RTCPeerConnection.prototype[method] = methodObj[method];
+    });
+  }
+
+  var modernStatsTypes = {
+    inboundrtp: 'inbound-rtp',
+    outboundrtp: 'outbound-rtp',
+    candidatepair: 'candidate-pair',
+    localcandidate: 'local-candidate',
+    remotecandidate: 'remote-candidate'
+  };
+
+  var nativeGetStats = window.RTCPeerConnection.prototype.getStats;
+  window.RTCPeerConnection.prototype.getStats = function getStats() {
+    var _arguments = Array.prototype.slice.call(arguments),
+        selector = _arguments[0],
+        onSucc = _arguments[1],
+        onErr = _arguments[2];
+
+    return nativeGetStats.apply(this, [selector || null]).then(function (stats) {
+      if (browserDetails.version < 53 && !onSucc) {
+        // Shim only promise getStats with spec-hyphens in type names
+        // Leave callback version alone; misc old uses of forEach before Map
+        try {
+          stats.forEach(function (stat) {
+            stat.type = modernStatsTypes[stat.type] || stat.type;
+          });
+        } catch (e) {
+          if (e.name !== 'TypeError') {
+            throw e;
+          }
+          // Avoid TypeError: "type" is read-only, in old versions. 34-43ish
+          stats.forEach(function (stat, i) {
+            stats.set(i, Object.assign({}, stat, {
+              type: modernStatsTypes[stat.type] || stat.type
+            }));
+          });
+        }
+      }
+      return stats;
+    }).then(onSucc, onErr);
+  };
+}
+
+function shimSenderGetStats(window) {
+  if (!((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection && window.RTCRtpSender)) {
+    return;
+  }
+  if (window.RTCRtpSender && 'getStats' in window.RTCRtpSender.prototype) {
+    return;
+  }
+  var origGetSenders = window.RTCPeerConnection.prototype.getSenders;
+  if (origGetSenders) {
+    window.RTCPeerConnection.prototype.getSenders = function getSenders() {
+      var _this = this;
+
+      var senders = origGetSenders.apply(this, []);
+      senders.forEach(function (sender) {
+        return sender._pc = _this;
+      });
+      return senders;
+    };
+  }
+
+  var origAddTrack = window.RTCPeerConnection.prototype.addTrack;
+  if (origAddTrack) {
+    window.RTCPeerConnection.prototype.addTrack = function addTrack() {
+      var sender = origAddTrack.apply(this, arguments);
+      sender._pc = this;
+      return sender;
+    };
+  }
+  window.RTCRtpSender.prototype.getStats = function getStats() {
+    return this.track ? this._pc.getStats(this.track) : Promise.resolve(new Map());
+  };
+}
+
+function shimReceiverGetStats(window) {
+  if (!((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection && window.RTCRtpSender)) {
+    return;
+  }
+  if (window.RTCRtpSender && 'getStats' in window.RTCRtpReceiver.prototype) {
+    return;
+  }
+  var origGetReceivers = window.RTCPeerConnection.prototype.getReceivers;
+  if (origGetReceivers) {
+    window.RTCPeerConnection.prototype.getReceivers = function getReceivers() {
+      var _this2 = this;
+
+      var receivers = origGetReceivers.apply(this, []);
+      receivers.forEach(function (receiver) {
+        return receiver._pc = _this2;
+      });
+      return receivers;
+    };
+  }
+  utils.wrapPeerConnectionEvent(window, 'track', function (e) {
+    e.receiver._pc = e.srcElement;
+    return e;
+  });
+  window.RTCRtpReceiver.prototype.getStats = function getStats() {
+    return this._pc.getStats(this.track);
+  };
+}
+
+function shimRemoveStream(window) {
+  if (!window.RTCPeerConnection || 'removeStream' in window.RTCPeerConnection.prototype) {
+    return;
+  }
+  window.RTCPeerConnection.prototype.removeStream = function removeStream(stream) {
+    var _this3 = this;
+
+    utils.deprecated('removeStream', 'removeTrack');
+    this.getSenders().forEach(function (sender) {
+      if (sender.track && stream.getTracks().includes(sender.track)) {
+        _this3.removeTrack(sender);
+      }
+    });
+  };
+}
+
+function shimRTCDataChannel(window) {
+  // rename DataChannel to RTCDataChannel (native fix in FF60):
+  // https://bugzilla.mozilla.org/show_bug.cgi?id=1173851
+  if (window.DataChannel && !window.RTCDataChannel) {
+    window.RTCDataChannel = window.DataChannel;
+  }
+}
+
+function shimAddTransceiver(window) {
+  // https://github.com/webrtcHacks/adapter/issues/998#issuecomment-516921647
+  // Firefox ignores the init sendEncodings options passed to addTransceiver
+  // https://bugzilla.mozilla.org/show_bug.cgi?id=1396918
+  if (!((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection)) {
+    return;
+  }
+  var origAddTransceiver = window.RTCPeerConnection.prototype.addTransceiver;
+  if (origAddTransceiver) {
+    window.RTCPeerConnection.prototype.addTransceiver = function addTransceiver() {
+      this.setParametersPromises = [];
+      var initParameters = arguments[1];
+      var shouldPerformCheck = initParameters && 'sendEncodings' in initParameters;
+      if (shouldPerformCheck) {
+        // If sendEncodings params are provided, validate grammar
+        initParameters.sendEncodings.forEach(function (encodingParam) {
+          if ('rid' in encodingParam) {
+            var ridRegex = /^[a-z0-9]{0,16}$/i;
+            if (!ridRegex.test(encodingParam.rid)) {
+              throw new TypeError('Invalid RID value provided.');
+            }
+          }
+          if ('scaleResolutionDownBy' in encodingParam) {
+            if (!(parseFloat(encodingParam.scaleResolutionDownBy) >= 1.0)) {
+              throw new RangeError('scale_resolution_down_by must be >= 1.0');
+            }
+          }
+          if ('maxFramerate' in encodingParam) {
+            if (!(parseFloat(encodingParam.maxFramerate) >= 0)) {
+              throw new RangeError('max_framerate must be >= 0.0');
+            }
+          }
+        });
+      }
+      var transceiver = origAddTransceiver.apply(this, arguments);
+      if (shouldPerformCheck) {
+        // Check if the init options were applied. If not we do this in an
+        // asynchronous way and save the promise reference in a global object.
+        // This is an ugly hack, but at the same time is way more robust than
+        // checking the sender parameters before and after the createOffer
+        // Also note that after the createoffer we are not 100% sure that
+        // the params were asynchronously applied so we might miss the
+        // opportunity to recreate offer.
+        var sender = transceiver.sender;
+
+        var params = sender.getParameters();
+        if (!('encodings' in params) ||
+        // Avoid being fooled by patched getParameters() below.
+        params.encodings.length === 1 && Object.keys(params.encodings[0]).length === 0) {
+          params.encodings = initParameters.sendEncodings;
+          sender.sendEncodings = initParameters.sendEncodings;
+          this.setParametersPromises.push(sender.setParameters(params).then(function () {
+            delete sender.sendEncodings;
+          }).catch(function () {
+            delete sender.sendEncodings;
+          }));
+        }
+      }
+      return transceiver;
+    };
+  }
+}
+
+function shimGetParameters(window) {
+  if (!((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCRtpSender)) {
+    return;
+  }
+  var origGetParameters = window.RTCRtpSender.prototype.getParameters;
+  if (origGetParameters) {
+    window.RTCRtpSender.prototype.getParameters = function getParameters() {
+      var params = origGetParameters.apply(this, arguments);
+      if (!('encodings' in params)) {
+        params.encodings = [].concat(this.sendEncodings || [{}]);
+      }
+      return params;
+    };
+  }
+}
+
+function shimCreateOffer(window) {
+  // https://github.com/webrtcHacks/adapter/issues/998#issuecomment-516921647
+  // Firefox ignores the init sendEncodings options passed to addTransceiver
+  // https://bugzilla.mozilla.org/show_bug.cgi?id=1396918
+  if (!((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection)) {
+    return;
+  }
+  var origCreateOffer = window.RTCPeerConnection.prototype.createOffer;
+  window.RTCPeerConnection.prototype.createOffer = function createOffer() {
+    var _this4 = this,
+        _arguments2 = arguments;
+
+    if (this.setParametersPromises && this.setParametersPromises.length) {
+      return Promise.all(this.setParametersPromises).then(function () {
+        return origCreateOffer.apply(_this4, _arguments2);
+      }).finally(function () {
+        _this4.setParametersPromises = [];
+      });
+    }
+    return origCreateOffer.apply(this, arguments);
+  };
+}
+
+function shimCreateAnswer(window) {
+  // https://github.com/webrtcHacks/adapter/issues/998#issuecomment-516921647
+  // Firefox ignores the init sendEncodings options passed to addTransceiver
+  // https://bugzilla.mozilla.org/show_bug.cgi?id=1396918
+  if (!((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection)) {
+    return;
+  }
+  var origCreateAnswer = window.RTCPeerConnection.prototype.createAnswer;
+  window.RTCPeerConnection.prototype.createAnswer = function createAnswer() {
+    var _this5 = this,
+        _arguments3 = arguments;
+
+    if (this.setParametersPromises && this.setParametersPromises.length) {
+      return Promise.all(this.setParametersPromises).then(function () {
+        return origCreateAnswer.apply(_this5, _arguments3);
+      }).finally(function () {
+        _this5.setParametersPromises = [];
+      });
+    }
+    return origCreateAnswer.apply(this, arguments);
+  };
+}
+
+},{"../utils":11,"./getdisplaymedia":8,"./getusermedia":9}],8:[function(require,module,exports){
+/*
+ *  Copyright (c) 2018 The adapter.js project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+/* eslint-env node */
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.shimGetDisplayMedia = shimGetDisplayMedia;
+function shimGetDisplayMedia(window, preferredMediaSource) {
+  if (window.navigator.mediaDevices && 'getDisplayMedia' in window.navigator.mediaDevices) {
+    return;
+  }
+  if (!window.navigator.mediaDevices) {
+    return;
+  }
+  window.navigator.mediaDevices.getDisplayMedia = function getDisplayMedia(constraints) {
+    if (!(constraints && constraints.video)) {
+      var err = new DOMException('getDisplayMedia without video ' + 'constraints is undefined');
+      err.name = 'NotFoundError';
+      // from https://heycam.github.io/webidl/#idl-DOMException-error-names
+      err.code = 8;
+      return Promise.reject(err);
+    }
+    if (constraints.video === true) {
+      constraints.video = { mediaSource: preferredMediaSource };
+    } else {
+      constraints.video.mediaSource = preferredMediaSource;
+    }
+    return window.navigator.mediaDevices.getUserMedia(constraints);
+  };
+}
+
+},{}],9:[function(require,module,exports){
+/*
+ *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+/* eslint-env node */
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+
+var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
+
+exports.shimGetUserMedia = shimGetUserMedia;
+
+var _utils = require('../utils');
+
+var utils = _interopRequireWildcard(_utils);
+
+function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }
+
+function shimGetUserMedia(window, browserDetails) {
+  var navigator = window && window.navigator;
+  var MediaStreamTrack = window && window.MediaStreamTrack;
+
+  navigator.getUserMedia = function (constraints, onSuccess, onError) {
+    // Replace Firefox 44+'s deprecation warning with unprefixed version.
+    utils.deprecated('navigator.getUserMedia', 'navigator.mediaDevices.getUserMedia');
+    navigator.mediaDevices.getUserMedia(constraints).then(onSuccess, onError);
+  };
+
+  if (!(browserDetails.version > 55 && 'autoGainControl' in navigator.mediaDevices.getSupportedConstraints())) {
+    var remap = function remap(obj, a, b) {
+      if (a in obj && !(b in obj)) {
+        obj[b] = obj[a];
+        delete obj[a];
+      }
+    };
+
+    var nativeGetUserMedia = navigator.mediaDevices.getUserMedia.bind(navigator.mediaDevices);
+    navigator.mediaDevices.getUserMedia = function (c) {
+      if ((typeof c === 'undefined' ? 'undefined' : _typeof(c)) === 'object' && _typeof(c.audio) === 'object') {
+        c = JSON.parse(JSON.stringify(c));
+        remap(c.audio, 'autoGainControl', 'mozAutoGainControl');
+        remap(c.audio, 'noiseSuppression', 'mozNoiseSuppression');
+      }
+      return nativeGetUserMedia(c);
+    };
+
+    if (MediaStreamTrack && MediaStreamTrack.prototype.getSettings) {
+      var nativeGetSettings = MediaStreamTrack.prototype.getSettings;
+      MediaStreamTrack.prototype.getSettings = function () {
+        var obj = nativeGetSettings.apply(this, arguments);
+        remap(obj, 'mozAutoGainControl', 'autoGainControl');
+        remap(obj, 'mozNoiseSuppression', 'noiseSuppression');
+        return obj;
+      };
+    }
+
+    if (MediaStreamTrack && MediaStreamTrack.prototype.applyConstraints) {
+      var nativeApplyConstraints = MediaStreamTrack.prototype.applyConstraints;
+      MediaStreamTrack.prototype.applyConstraints = function (c) {
+        if (this.kind === 'audio' && (typeof c === 'undefined' ? 'undefined' : _typeof(c)) === 'object') {
+          c = JSON.parse(JSON.stringify(c));
+          remap(c, 'autoGainControl', 'mozAutoGainControl');
+          remap(c, 'noiseSuppression', 'mozNoiseSuppression');
+        }
+        return nativeApplyConstraints.apply(this, [c]);
+      };
+    }
+  }
+}
+
+},{"../utils":11}],10:[function(require,module,exports){
+/*
+ *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+
+var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
+
+exports.shimLocalStreamsAPI = shimLocalStreamsAPI;
+exports.shimRemoteStreamsAPI = shimRemoteStreamsAPI;
+exports.shimCallbacksAPI = shimCallbacksAPI;
+exports.shimGetUserMedia = shimGetUserMedia;
+exports.shimConstraints = shimConstraints;
+exports.shimRTCIceServerUrls = shimRTCIceServerUrls;
+exports.shimTrackEventTransceiver = shimTrackEventTransceiver;
+exports.shimCreateOfferLegacy = shimCreateOfferLegacy;
+exports.shimAudioContext = shimAudioContext;
+
+var _utils = require('../utils');
+
+var utils = _interopRequireWildcard(_utils);
+
+function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }
+
+function shimLocalStreamsAPI(window) {
+  if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) !== 'object' || !window.RTCPeerConnection) {
+    return;
+  }
+  if (!('getLocalStreams' in window.RTCPeerConnection.prototype)) {
+    window.RTCPeerConnection.prototype.getLocalStreams = function getLocalStreams() {
+      if (!this._localStreams) {
+        this._localStreams = [];
+      }
+      return this._localStreams;
+    };
+  }
+  if (!('addStream' in window.RTCPeerConnection.prototype)) {
+    var _addTrack = window.RTCPeerConnection.prototype.addTrack;
+    window.RTCPeerConnection.prototype.addStream = function addStream(stream) {
+      var _this = this;
+
+      if (!this._localStreams) {
+        this._localStreams = [];
+      }
+      if (!this._localStreams.includes(stream)) {
+        this._localStreams.push(stream);
+      }
+      // Try to emulate Chrome's behaviour of adding in audio-video order.
+      // Safari orders by track id.
+      stream.getAudioTracks().forEach(function (track) {
+        return _addTrack.call(_this, track, stream);
+      });
+      stream.getVideoTracks().forEach(function (track) {
+        return _addTrack.call(_this, track, stream);
+      });
+    };
+
+    window.RTCPeerConnection.prototype.addTrack = function addTrack(track) {
+      var _this2 = this;
+
+      for (var _len = arguments.length, streams = Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
+        streams[_key - 1] = arguments[_key];
+      }
+
+      if (streams) {
+        streams.forEach(function (stream) {
+          if (!_this2._localStreams) {
+            _this2._localStreams = [stream];
+          } else if (!_this2._localStreams.includes(stream)) {
+            _this2._localStreams.push(stream);
+          }
+        });
+      }
+      return _addTrack.apply(this, arguments);
+    };
+  }
+  if (!('removeStream' in window.RTCPeerConnection.prototype)) {
+    window.RTCPeerConnection.prototype.removeStream = function removeStream(stream) {
+      var _this3 = this;
+
+      if (!this._localStreams) {
+        this._localStreams = [];
+      }
+      var index = this._localStreams.indexOf(stream);
+      if (index === -1) {
+        return;
+      }
+      this._localStreams.splice(index, 1);
+      var tracks = stream.getTracks();
+      this.getSenders().forEach(function (sender) {
+        if (tracks.includes(sender.track)) {
+          _this3.removeTrack(sender);
+        }
+      });
+    };
+  }
+}
+
+function shimRemoteStreamsAPI(window) {
+  if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) !== 'object' || !window.RTCPeerConnection) {
+    return;
+  }
+  if (!('getRemoteStreams' in window.RTCPeerConnection.prototype)) {
+    window.RTCPeerConnection.prototype.getRemoteStreams = function getRemoteStreams() {
+      return this._remoteStreams ? this._remoteStreams : [];
+    };
+  }
+  if (!('onaddstream' in window.RTCPeerConnection.prototype)) {
+    Object.defineProperty(window.RTCPeerConnection.prototype, 'onaddstream', {
+      get: function get() {
+        return this._onaddstream;
+      },
+      set: function set(f) {
+        var _this4 = this;
+
+        if (this._onaddstream) {
+          this.removeEventListener('addstream', this._onaddstream);
+          this.removeEventListener('track', this._onaddstreampoly);
+        }
+        this.addEventListener('addstream', this._onaddstream = f);
+        this.addEventListener('track', this._onaddstreampoly = function (e) {
+          e.streams.forEach(function (stream) {
+            if (!_this4._remoteStreams) {
+              _this4._remoteStreams = [];
+            }
+            if (_this4._remoteStreams.includes(stream)) {
+              return;
+            }
+            _this4._remoteStreams.push(stream);
+            var event = new Event('addstream');
+            event.stream = stream;
+            _this4.dispatchEvent(event);
+          });
+        });
+      }
+    });
+    var origSetRemoteDescription = window.RTCPeerConnection.prototype.setRemoteDescription;
+    window.RTCPeerConnection.prototype.setRemoteDescription = function setRemoteDescription() {
+      var pc = this;
+      if (!this._onaddstreampoly) {
+        this.addEventListener('track', this._onaddstreampoly = function (e) {
+          e.streams.forEach(function (stream) {
+            if (!pc._remoteStreams) {
+              pc._remoteStreams = [];
+            }
+            if (pc._remoteStreams.indexOf(stream) >= 0) {
+              return;
+            }
+            pc._remoteStreams.push(stream);
+            var event = new Event('addstream');
+            event.stream = stream;
+            pc.dispatchEvent(event);
+          });
+        });
+      }
+      return origSetRemoteDescription.apply(pc, arguments);
+    };
+  }
+}
+
+function shimCallbacksAPI(window) {
+  if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) !== 'object' || !window.RTCPeerConnection) {
+    return;
+  }
+  var prototype = window.RTCPeerConnection.prototype;
+  var origCreateOffer = prototype.createOffer;
+  var origCreateAnswer = prototype.createAnswer;
+  var setLocalDescription = prototype.setLocalDescription;
+  var setRemoteDescription = prototype.setRemoteDescription;
+  var addIceCandidate = prototype.addIceCandidate;
+
+  prototype.createOffer = function createOffer(successCallback, failureCallback) {
+    var options = arguments.length >= 2 ? arguments[2] : arguments[0];
+    var promise = origCreateOffer.apply(this, [options]);
+    if (!failureCallback) {
+      return promise;
+    }
+    promise.then(successCallback, failureCallback);
+    return Promise.resolve();
+  };
+
+  prototype.createAnswer = function createAnswer(successCallback, failureCallback) {
+    var options = arguments.length >= 2 ? arguments[2] : arguments[0];
+    var promise = origCreateAnswer.apply(this, [options]);
+    if (!failureCallback) {
+      return promise;
+    }
+    promise.then(successCallback, failureCallback);
+    return Promise.resolve();
+  };
+
+  var withCallback = function withCallback(description, successCallback, failureCallback) {
+    var promise = setLocalDescription.apply(this, [description]);
+    if (!failureCallback) {
+      return promise;
+    }
+    promise.then(successCallback, failureCallback);
+    return Promise.resolve();
+  };
+  prototype.setLocalDescription = withCallback;
+
+  withCallback = function withCallback(description, successCallback, failureCallback) {
+    var promise = setRemoteDescription.apply(this, [description]);
+    if (!failureCallback) {
+      return promise;
+    }
+    promise.then(successCallback, failureCallback);
+    return Promise.resolve();
+  };
+  prototype.setRemoteDescription = withCallback;
+
+  withCallback = function withCallback(candidate, successCallback, failureCallback) {
+    var promise = addIceCandidate.apply(this, [candidate]);
+    if (!failureCallback) {
+      return promise;
+    }
+    promise.then(successCallback, failureCallback);
+    return Promise.resolve();
+  };
+  prototype.addIceCandidate = withCallback;
+}
+
+function shimGetUserMedia(window) {
+  var navigator = window && window.navigator;
+
+  if (navigator.mediaDevices && navigator.mediaDevices.getUserMedia) {
+    // shim not needed in Safari 12.1
+    var mediaDevices = navigator.mediaDevices;
+    var _getUserMedia = mediaDevices.getUserMedia.bind(mediaDevices);
+    navigator.mediaDevices.getUserMedia = function (constraints) {
+      return _getUserMedia(shimConstraints(constraints));
+    };
+  }
+
+  if (!navigator.getUserMedia && navigator.mediaDevices && navigator.mediaDevices.getUserMedia) {
+    navigator.getUserMedia = function getUserMedia(constraints, cb, errcb) {
+      navigator.mediaDevices.getUserMedia(constraints).then(cb, errcb);
+    }.bind(navigator);
+  }
+}
+
+function shimConstraints(constraints) {
+  if (constraints && constraints.video !== undefined) {
+    return Object.assign({}, constraints, { video: utils.compactObject(constraints.video) });
+  }
+
+  return constraints;
+}
+
+function shimRTCIceServerUrls(window) {
+  if (!window.RTCPeerConnection) {
+    return;
+  }
+  // migrate from non-spec RTCIceServer.url to RTCIceServer.urls
+  var OrigPeerConnection = window.RTCPeerConnection;
+  window.RTCPeerConnection = function RTCPeerConnection(pcConfig, pcConstraints) {
+    if (pcConfig && pcConfig.iceServers) {
+      var newIceServers = [];
+      for (var i = 0; i < pcConfig.iceServers.length; i++) {
+        var server = pcConfig.iceServers[i];
+        if (!server.hasOwnProperty('urls') && server.hasOwnProperty('url')) {
+          utils.deprecated('RTCIceServer.url', 'RTCIceServer.urls');
+          server = JSON.parse(JSON.stringify(server));
+          server.urls = server.url;
+          delete server.url;
+          newIceServers.push(server);
+        } else {
+          newIceServers.push(pcConfig.iceServers[i]);
+        }
+      }
+      pcConfig.iceServers = newIceServers;
+    }
+    return new OrigPeerConnection(pcConfig, pcConstraints);
+  };
+  window.RTCPeerConnection.prototype = OrigPeerConnection.prototype;
+  // wrap static methods. Currently just generateCertificate.
+  if ('generateCertificate' in OrigPeerConnection) {
+    Object.defineProperty(window.RTCPeerConnection, 'generateCertificate', {
+      get: function get() {
+        return OrigPeerConnection.generateCertificate;
+      }
+    });
+  }
+}
+
+function shimTrackEventTransceiver(window) {
+  // Add event.transceiver member over deprecated event.receiver
+  if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCTrackEvent && 'receiver' in window.RTCTrackEvent.prototype && !('transceiver' in window.RTCTrackEvent.prototype)) {
+    Object.defineProperty(window.RTCTrackEvent.prototype, 'transceiver', {
+      get: function get() {
+        return { receiver: this.receiver };
+      }
+    });
+  }
+}
+
+function shimCreateOfferLegacy(window) {
+  var origCreateOffer = window.RTCPeerConnection.prototype.createOffer;
+  window.RTCPeerConnection.prototype.createOffer = function createOffer(offerOptions) {
+    if (offerOptions) {
+      if (typeof offerOptions.offerToReceiveAudio !== 'undefined') {
+        // support bit values
+        offerOptions.offerToReceiveAudio = !!offerOptions.offerToReceiveAudio;
+      }
+      var audioTransceiver = this.getTransceivers().find(function (transceiver) {
+        return transceiver.receiver.track.kind === 'audio';
+      });
+      if (offerOptions.offerToReceiveAudio === false && audioTransceiver) {
+        if (audioTransceiver.direction === 'sendrecv') {
+          if (audioTransceiver.setDirection) {
+            audioTransceiver.setDirection('sendonly');
+          } else {
+            audioTransceiver.direction = 'sendonly';
+          }
+        } else if (audioTransceiver.direction === 'recvonly') {
+          if (audioTransceiver.setDirection) {
+            audioTransceiver.setDirection('inactive');
+          } else {
+            audioTransceiver.direction = 'inactive';
+          }
+        }
+      } else if (offerOptions.offerToReceiveAudio === true && !audioTransceiver) {
+        this.addTransceiver('audio', { direction: 'recvonly' });
+      }
+
+      if (typeof offerOptions.offerToReceiveVideo !== 'undefined') {
+        // support bit values
+        offerOptions.offerToReceiveVideo = !!offerOptions.offerToReceiveVideo;
+      }
+      var videoTransceiver = this.getTransceivers().find(function (transceiver) {
+        return transceiver.receiver.track.kind === 'video';
+      });
+      if (offerOptions.offerToReceiveVideo === false && videoTransceiver) {
+        if (videoTransceiver.direction === 'sendrecv') {
+          if (videoTransceiver.setDirection) {
+            videoTransceiver.setDirection('sendonly');
+          } else {
+            videoTransceiver.direction = 'sendonly';
+          }
+        } else if (videoTransceiver.direction === 'recvonly') {
+          if (videoTransceiver.setDirection) {
+            videoTransceiver.setDirection('inactive');
+          } else {
+            videoTransceiver.direction = 'inactive';
+          }
+        }
+      } else if (offerOptions.offerToReceiveVideo === true && !videoTransceiver) {
+        this.addTransceiver('video', { direction: 'recvonly' });
+      }
+    }
+    return origCreateOffer.apply(this, arguments);
+  };
+}
+
+function shimAudioContext(window) {
+  if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) !== 'object' || window.AudioContext) {
+    return;
+  }
+  window.AudioContext = window.webkitAudioContext;
+}
+
+},{"../utils":11}],11:[function(require,module,exports){
+/*
+ *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+/* eslint-env node */
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+
+var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
+
+exports.extractVersion = extractVersion;
+exports.wrapPeerConnectionEvent = wrapPeerConnectionEvent;
+exports.disableLog = disableLog;
+exports.disableWarnings = disableWarnings;
+exports.log = log;
+exports.deprecated = deprecated;
+exports.detectBrowser = detectBrowser;
+exports.compactObject = compactObject;
+exports.walkStats = walkStats;
+exports.filterStats = filterStats;
+
+function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
+
+var logDisabled_ = true;
+var deprecationWarnings_ = true;
+
+/**
+ * Extract browser version out of the provided user agent string.
+ *
+ * @param {!string} uastring userAgent string.
+ * @param {!string} expr Regular expression used as match criteria.
+ * @param {!number} pos position in the version string to be returned.
+ * @return {!number} browser version.
+ */
+function extractVersion(uastring, expr, pos) {
+  var match = uastring.match(expr);
+  return match && match.length >= pos && parseInt(match[pos], 10);
+}
+
+// Wraps the peerconnection event eventNameToWrap in a function
+// which returns the modified event object (or false to prevent
+// the event).
+function wrapPeerConnectionEvent(window, eventNameToWrap, wrapper) {
+  if (!window.RTCPeerConnection) {
+    return;
+  }
+  var proto = window.RTCPeerConnection.prototype;
+  var nativeAddEventListener = proto.addEventListener;
+  proto.addEventListener = function (nativeEventName, cb) {
+    if (nativeEventName !== eventNameToWrap) {
+      return nativeAddEventListener.apply(this, arguments);
+    }
+    var wrappedCallback = function wrappedCallback(e) {
+      var modifiedEvent = wrapper(e);
+      if (modifiedEvent) {
+        if (cb.handleEvent) {
+          cb.handleEvent(modifiedEvent);
+        } else {
+          cb(modifiedEvent);
+        }
+      }
+    };
+    this._eventMap = this._eventMap || {};
+    if (!this._eventMap[eventNameToWrap]) {
+      this._eventMap[eventNameToWrap] = new Map();
+    }
+    this._eventMap[eventNameToWrap].set(cb, wrappedCallback);
+    return nativeAddEventListener.apply(this, [nativeEventName, wrappedCallback]);
+  };
+
+  var nativeRemoveEventListener = proto.removeEventListener;
+  proto.removeEventListener = function (nativeEventName, cb) {
+    if (nativeEventName !== eventNameToWrap || !this._eventMap || !this._eventMap[eventNameToWrap]) {
+      return nativeRemoveEventListener.apply(this, arguments);
+    }
+    if (!this._eventMap[eventNameToWrap].has(cb)) {
+      return nativeRemoveEventListener.apply(this, arguments);
+    }
+    var unwrappedCb = this._eventMap[eventNameToWrap].get(cb);
+    this._eventMap[eventNameToWrap].delete(cb);
+    if (this._eventMap[eventNameToWrap].size === 0) {
+      delete this._eventMap[eventNameToWrap];
+    }
+    if (Object.keys(this._eventMap).length === 0) {
+      delete this._eventMap;
+    }
+    return nativeRemoveEventListener.apply(this, [nativeEventName, unwrappedCb]);
+  };
+
+  Object.defineProperty(proto, 'on' + eventNameToWrap, {
+    get: function get() {
+      return this['_on' + eventNameToWrap];
+    },
+    set: function set(cb) {
+      if (this['_on' + eventNameToWrap]) {
+        this.removeEventListener(eventNameToWrap, this['_on' + eventNameToWrap]);
+        delete this['_on' + eventNameToWrap];
+      }
+      if (cb) {
+        this.addEventListener(eventNameToWrap, this['_on' + eventNameToWrap] = cb);
+      }
+    },
+
+    enumerable: true,
+    configurable: true
+  });
+}
+
+function disableLog(bool) {
+  if (typeof bool !== 'boolean') {
+    return new Error('Argument type: ' + (typeof bool === 'undefined' ? 'undefined' : _typeof(bool)) + '. Please use a boolean.');
+  }
+  logDisabled_ = bool;
+  return bool ? 'adapter.js logging disabled' : 'adapter.js logging enabled';
+}
+
+/**
+ * Disable or enable deprecation warnings
+ * @param {!boolean} bool set to true to disable warnings.
+ */
+function disableWarnings(bool) {
+  if (typeof bool !== 'boolean') {
+    return new Error('Argument type: ' + (typeof bool === 'undefined' ? 'undefined' : _typeof(bool)) + '. Please use a boolean.');
+  }
+  deprecationWarnings_ = !bool;
+  return 'adapter.js deprecation warnings ' + (bool ? 'disabled' : 'enabled');
+}
+
+function log() {
+  if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object') {
+    if (logDisabled_) {
+      return;
+    }
+    if (typeof console !== 'undefined' && typeof console.log === 'function') {
+      console.log.apply(console, arguments);
+    }
+  }
+}
+
+/**
+ * Shows a deprecation warning suggesting the modern and spec-compatible API.
+ */
+function deprecated(oldMethod, newMethod) {
+  if (!deprecationWarnings_) {
+    return;
+  }
+  console.warn(oldMethod + ' is deprecated, please use ' + newMethod + ' instead.');
+}
+
+/**
+ * Browser detector.
+ *
+ * @return {object} result containing browser and version
+ *     properties.
+ */
+function detectBrowser(window) {
+  // Returned result object.
+  var result = { browser: null, version: null };
+
+  // Fail early if it's not a browser
+  if (typeof window === 'undefined' || !window.navigator) {
+    result.browser = 'Not a browser.';
+    return result;
+  }
+
+  var navigator = window.navigator;
+
+
+  if (navigator.mozGetUserMedia) {
+    // Firefox.
+    result.browser = 'firefox';
+    result.version = extractVersion(navigator.userAgent, /Firefox\/(\d+)\./, 1);
+  } else if (navigator.webkitGetUserMedia || window.isSecureContext === false && window.webkitRTCPeerConnection && !window.RTCIceGatherer) {
+    // Chrome, Chromium, Webview, Opera.
+    // Version matches Chrome/WebRTC version.
+    // Chrome 74 removed webkitGetUserMedia on http as well so we need the
+    // more complicated fallback to webkitRTCPeerConnection.
+    result.browser = 'chrome';
+    result.version = extractVersion(navigator.userAgent, /Chrom(e|ium)\/(\d+)\./, 2);
+  } else if (window.RTCPeerConnection && navigator.userAgent.match(/AppleWebKit\/(\d+)\./)) {
+    // Safari.
+    result.browser = 'safari';
+    result.version = extractVersion(navigator.userAgent, /AppleWebKit\/(\d+)\./, 1);
+    result.supportsUnifiedPlan = window.RTCRtpTransceiver && 'currentDirection' in window.RTCRtpTransceiver.prototype;
+  } else {
+    // Default fallthrough: not supported.
+    result.browser = 'Not a supported browser.';
+    return result;
+  }
+
+  return result;
+}
+
+/**
+ * Checks if something is an object.
+ *
+ * @param {*} val The something you want to check.
+ * @return true if val is an object, false otherwise.
+ */
+function isObject(val) {
+  return Object.prototype.toString.call(val) === '[object Object]';
+}
+
+/**
+ * Remove all empty objects and undefined values
+ * from a nested object -- an enhanced and vanilla version
+ * of Lodash's `compact`.
+ */
+function compactObject(data) {
+  if (!isObject(data)) {
+    return data;
+  }
+
+  return Object.keys(data).reduce(function (accumulator, key) {
+    var isObj = isObject(data[key]);
+    var value = isObj ? compactObject(data[key]) : data[key];
+    var isEmptyObject = isObj && !Object.keys(value).length;
+    if (value === undefined || isEmptyObject) {
+      return accumulator;
+    }
+    return Object.assign(accumulator, _defineProperty({}, key, value));
+  }, {});
+}
+
+/* iterates the stats graph recursively. */
+function walkStats(stats, base, resultSet) {
+  if (!base || resultSet.has(base.id)) {
+    return;
+  }
+  resultSet.set(base.id, base);
+  Object.keys(base).forEach(function (name) {
+    if (name.endsWith('Id')) {
+      walkStats(stats, stats.get(base[name]), resultSet);
+    } else if (name.endsWith('Ids')) {
+      base[name].forEach(function (id) {
+        walkStats(stats, stats.get(id), resultSet);
+      });
+    }
+  });
+}
+
+/* filter getStats for a sender/receiver track. */
+function filterStats(result, track, outbound) {
+  var streamStatsType = outbound ? 'outbound-rtp' : 'inbound-rtp';
+  var filteredResult = new Map();
+  if (track === null) {
+    return filteredResult;
+  }
+  var trackStats = [];
+  result.forEach(function (value) {
+    if (value.type === 'track' && value.trackIdentifier === track.id) {
+      trackStats.push(value);
+    }
+  });
+  trackStats.forEach(function (trackStat) {
+    result.forEach(function (stats) {
+      if (stats.type === streamStatsType && stats.trackId === trackStat.id) {
+        walkStats(result, stats, filteredResult);
+      }
+    });
+  });
+  return filteredResult;
+}
+
+},{}],12:[function(require,module,exports){
+/* eslint-env node */
+'use strict';
+
+// SDP helpers.
+
+var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
+
+var SDPUtils = {};
+
+// Generate an alphanumeric identifier for cname or mids.
+// TODO: use UUIDs instead? https://gist.github.com/jed/982883
+SDPUtils.generateIdentifier = function () {
+  return Math.random().toString(36).substr(2, 10);
+};
+
+// The RTCP CNAME used by all peerconnections from the same JS.
+SDPUtils.localCName = SDPUtils.generateIdentifier();
+
+// Splits SDP into lines, dealing with both CRLF and LF.
+SDPUtils.splitLines = function (blob) {
+  return blob.trim().split('\n').map(function (line) {
+    return line.trim();
+  });
+};
+// Splits SDP into sessionpart and mediasections. Ensures CRLF.
+SDPUtils.splitSections = function (blob) {
+  var parts = blob.split('\nm=');
+  return parts.map(function (part, index) {
+    return (index > 0 ? 'm=' + part : part).trim() + '\r\n';
+  });
+};
+
+// Returns the session description.
+SDPUtils.getDescription = function (blob) {
+  var sections = SDPUtils.splitSections(blob);
+  return sections && sections[0];
+};
+
+// Returns the individual media sections.
+SDPUtils.getMediaSections = function (blob) {
+  var sections = SDPUtils.splitSections(blob);
+  sections.shift();
+  return sections;
+};
+
+// Returns lines that start with a certain prefix.
+SDPUtils.matchPrefix = function (blob, prefix) {
+  return SDPUtils.splitLines(blob).filter(function (line) {
+    return line.indexOf(prefix) === 0;
+  });
+};
+
+// Parses an ICE candidate line. Sample input:
+// candidate:702786350 2 udp 41819902 8.8.8.8 60769 typ relay raddr 8.8.8.8
+// rport 55996"
+// Input can be prefixed with a=.
+SDPUtils.parseCandidate = function (line) {
+  var parts = void 0;
+  // Parse both variants.
+  if (line.indexOf('a=candidate:') === 0) {
+    parts = line.substring(12).split(' ');
+  } else {
+    parts = line.substring(10).split(' ');
+  }
+
+  var candidate = {
+    foundation: parts[0],
+    component: { 1: 'rtp', 2: 'rtcp' }[parts[1]] || parts[1],
+    protocol: parts[2].toLowerCase(),
+    priority: parseInt(parts[3], 10),
+    ip: parts[4],
+    address: parts[4], // address is an alias for ip.
+    port: parseInt(parts[5], 10),
+    // skip parts[6] == 'typ'
+    type: parts[7]
+  };
+
+  for (var i = 8; i < parts.length; i += 2) {
+    switch (parts[i]) {
+      case 'raddr':
+        candidate.relatedAddress = parts[i + 1];
+        break;
+      case 'rport':
+        candidate.relatedPort = parseInt(parts[i + 1], 10);
+        break;
+      case 'tcptype':
+        candidate.tcpType = parts[i + 1];
+        break;
+      case 'ufrag':
+        candidate.ufrag = parts[i + 1]; // for backward compatibility.
+        candidate.usernameFragment = parts[i + 1];
+        break;
+      default:
+        // extension handling, in particular ufrag. Don't overwrite.
+        if (candidate[parts[i]] === undefined) {
+          candidate[parts[i]] = parts[i + 1];
+        }
+        break;
+    }
+  }
+  return candidate;
+};
+
+// Translates a candidate object into SDP candidate attribute.
+// This does not include the a= prefix!
+SDPUtils.writeCandidate = function (candidate) {
+  var sdp = [];
+  sdp.push(candidate.foundation);
+
+  var component = candidate.component;
+  if (component === 'rtp') {
+    sdp.push(1);
+  } else if (component === 'rtcp') {
+    sdp.push(2);
+  } else {
+    sdp.push(component);
+  }
+  sdp.push(candidate.protocol.toUpperCase());
+  sdp.push(candidate.priority);
+  sdp.push(candidate.address || candidate.ip);
+  sdp.push(candidate.port);
+
+  var type = candidate.type;
+  sdp.push('typ');
+  sdp.push(type);
+  if (type !== 'host' && candidate.relatedAddress && candidate.relatedPort) {
+    sdp.push('raddr');
+    sdp.push(candidate.relatedAddress);
+    sdp.push('rport');
+    sdp.push(candidate.relatedPort);
+  }
+  if (candidate.tcpType && candidate.protocol.toLowerCase() === 'tcp') {
+    sdp.push('tcptype');
+    sdp.push(candidate.tcpType);
+  }
+  if (candidate.usernameFragment || candidate.ufrag) {
+    sdp.push('ufrag');
+    sdp.push(candidate.usernameFragment || candidate.ufrag);
+  }
+  return 'candidate:' + sdp.join(' ');
+};
+
+// Parses an ice-options line, returns an array of option tags.
+// Sample input:
+// a=ice-options:foo bar
+SDPUtils.parseIceOptions = function (line) {
+  return line.substr(14).split(' ');
+};
+
+// Parses a rtpmap line, returns RTCRtpCoddecParameters. Sample input:
+// a=rtpmap:111 opus/48000/2
+SDPUtils.parseRtpMap = function (line) {
+  var parts = line.substr(9).split(' ');
+  var parsed = {
+    payloadType: parseInt(parts.shift(), 10) // was: id
+  };
+
+  parts = parts[0].split('/');
+
+  parsed.name = parts[0];
+  parsed.clockRate = parseInt(parts[1], 10); // was: clockrate
+  parsed.channels = parts.length === 3 ? parseInt(parts[2], 10) : 1;
+  // legacy alias, got renamed back to channels in ORTC.
+  parsed.numChannels = parsed.channels;
+  return parsed;
+};
+
+// Generates a rtpmap line from RTCRtpCodecCapability or
+// RTCRtpCodecParameters.
+SDPUtils.writeRtpMap = function (codec) {
+  var pt = codec.payloadType;
+  if (codec.preferredPayloadType !== undefined) {
+    pt = codec.preferredPayloadType;
+  }
+  var channels = codec.channels || codec.numChannels || 1;
+  return 'a=rtpmap:' + pt + ' ' + codec.name + '/' + codec.clockRate + (channels !== 1 ? '/' + channels : '') + '\r\n';
+};
+
+// Parses a extmap line (headerextension from RFC 5285). Sample input:
+// a=extmap:2 urn:ietf:params:rtp-hdrext:toffset
+// a=extmap:2/sendonly urn:ietf:params:rtp-hdrext:toffset
+SDPUtils.parseExtmap = function (line) {
+  var parts = line.substr(9).split(' ');
+  return {
+    id: parseInt(parts[0], 10),
+    direction: parts[0].indexOf('/') > 0 ? parts[0].split('/')[1] : 'sendrecv',
+    uri: parts[1]
+  };
+};
+
+// Generates an extmap line from RTCRtpHeaderExtensionParameters or
+// RTCRtpHeaderExtension.
+SDPUtils.writeExtmap = function (headerExtension) {
+  return 'a=extmap:' + (headerExtension.id || headerExtension.preferredId) + (headerExtension.direction && headerExtension.direction !== 'sendrecv' ? '/' + headerExtension.direction : '') + ' ' + headerExtension.uri + '\r\n';
+};
+
+// Parses a fmtp line, returns dictionary. Sample input:
+// a=fmtp:96 vbr=on;cng=on
+// Also deals with vbr=on; cng=on
+SDPUtils.parseFmtp = function (line) {
+  var parsed = {};
+  var kv = void 0;
+  var parts = line.substr(line.indexOf(' ') + 1).split(';');
+  for (var j = 0; j < parts.length; j++) {
+    kv = parts[j].trim().split('=');
+    parsed[kv[0].trim()] = kv[1];
+  }
+  return parsed;
+};
+
+// Generates a fmtp line from RTCRtpCodecCapability or RTCRtpCodecParameters.
+SDPUtils.writeFmtp = function (codec) {
+  var line = '';
+  var pt = codec.payloadType;
+  if (codec.preferredPayloadType !== undefined) {
+    pt = codec.preferredPayloadType;
+  }
+  if (codec.parameters && Object.keys(codec.parameters).length) {
+    var params = [];
+    Object.keys(codec.parameters).forEach(function (param) {
+      if (codec.parameters[param] !== undefined) {
+        params.push(param + '=' + codec.parameters[param]);
+      } else {
+        params.push(param);
+      }
+    });
+    line += 'a=fmtp:' + pt + ' ' + params.join(';') + '\r\n';
+  }
+  return line;
+};
+
+// Parses a rtcp-fb line, returns RTCPRtcpFeedback object. Sample input:
+// a=rtcp-fb:98 nack rpsi
+SDPUtils.parseRtcpFb = function (line) {
+  var parts = line.substr(line.indexOf(' ') + 1).split(' ');
+  return {
+    type: parts.shift(),
+    parameter: parts.join(' ')
+  };
+};
+
+// Generate a=rtcp-fb lines from RTCRtpCodecCapability or RTCRtpCodecParameters.
+SDPUtils.writeRtcpFb = function (codec) {
+  var lines = '';
+  var pt = codec.payloadType;
+  if (codec.preferredPayloadType !== undefined) {
+    pt = codec.preferredPayloadType;
+  }
+  if (codec.rtcpFeedback && codec.rtcpFeedback.length) {
+    // FIXME: special handling for trr-int?
+    codec.rtcpFeedback.forEach(function (fb) {
+      lines += 'a=rtcp-fb:' + pt + ' ' + fb.type + (fb.parameter && fb.parameter.length ? ' ' + fb.parameter : '') + '\r\n';
+    });
+  }
+  return lines;
+};
+
+// Parses a RFC 5576 ssrc media attribute. Sample input:
+// a=ssrc:3735928559 cname:something
+SDPUtils.parseSsrcMedia = function (line) {
+  var sp = line.indexOf(' ');
+  var parts = {
+    ssrc: parseInt(line.substr(7, sp - 7), 10)
+  };
+  var colon = line.indexOf(':', sp);
+  if (colon > -1) {
+    parts.attribute = line.substr(sp + 1, colon - sp - 1);
+    parts.value = line.substr(colon + 1);
+  } else {
+    parts.attribute = line.substr(sp + 1);
+  }
+  return parts;
+};
+
+// Parse a ssrc-group line (see RFC 5576). Sample input:
+// a=ssrc-group:semantics 12 34
+SDPUtils.parseSsrcGroup = function (line) {
+  var parts = line.substr(13).split(' ');
+  return {
+    semantics: parts.shift(),
+    ssrcs: parts.map(function (ssrc) {
+      return parseInt(ssrc, 10);
+    })
+  };
+};
+
+// Extracts the MID (RFC 5888) from a media section.
+// Returns the MID or undefined if no mid line was found.
+SDPUtils.getMid = function (mediaSection) {
+  var mid = SDPUtils.matchPrefix(mediaSection, 'a=mid:')[0];
+  if (mid) {
+    return mid.substr(6);
+  }
+};
+
+// Parses a fingerprint line for DTLS-SRTP.
+SDPUtils.parseFingerprint = function (line) {
+  var parts = line.substr(14).split(' ');
+  return {
+    algorithm: parts[0].toLowerCase(), // algorithm is case-sensitive in Edge.
+    value: parts[1].toUpperCase() // the definition is upper-case in RFC 4572.
+  };
+};
+
+// Extracts DTLS parameters from SDP media section or sessionpart.
+// FIXME: for consistency with other functions this should only
+//   get the fingerprint line as input. See also getIceParameters.
+SDPUtils.getDtlsParameters = function (mediaSection, sessionpart) {
+  var lines = SDPUtils.matchPrefix(mediaSection + sessionpart, 'a=fingerprint:');
+  // Note: a=setup line is ignored since we use the 'auto' role in Edge.
+  return {
+    role: 'auto',
+    fingerprints: lines.map(SDPUtils.parseFingerprint)
+  };
+};
+
+// Serializes DTLS parameters to SDP.
+SDPUtils.writeDtlsParameters = function (params, setupType) {
+  var sdp = 'a=setup:' + setupType + '\r\n';
+  params.fingerprints.forEach(function (fp) {
+    sdp += 'a=fingerprint:' + fp.algorithm + ' ' + fp.value + '\r\n';
+  });
+  return sdp;
+};
+
+// Parses a=crypto lines into
+//   https://rawgit.com/aboba/edgertc/master/msortc-rs4.html#dictionary-rtcsrtpsdesparameters-members
+SDPUtils.parseCryptoLine = function (line) {
+  var parts = line.substr(9).split(' ');
+  return {
+    tag: parseInt(parts[0], 10),
+    cryptoSuite: parts[1],
+    keyParams: parts[2],
+    sessionParams: parts.slice(3)
+  };
+};
+
+SDPUtils.writeCryptoLine = function (parameters) {
+  return 'a=crypto:' + parameters.tag + ' ' + parameters.cryptoSuite + ' ' + (_typeof(parameters.keyParams) === 'object' ? SDPUtils.writeCryptoKeyParams(parameters.keyParams) : parameters.keyParams) + (parameters.sessionParams ? ' ' + parameters.sessionParams.join(' ') : '') + '\r\n';
+};
+
+// Parses the crypto key parameters into
+//   https://rawgit.com/aboba/edgertc/master/msortc-rs4.html#rtcsrtpkeyparam*
+SDPUtils.parseCryptoKeyParams = function (keyParams) {
+  if (keyParams.indexOf('inline:') !== 0) {
+    return null;
+  }
+  var parts = keyParams.substr(7).split('|');
+  return {
+    keyMethod: 'inline',
+    keySalt: parts[0],
+    lifeTime: parts[1],
+    mkiValue: parts[2] ? parts[2].split(':')[0] : undefined,
+    mkiLength: parts[2] ? parts[2].split(':')[1] : undefined
+  };
+};
+
+SDPUtils.writeCryptoKeyParams = function (keyParams) {
+  return keyParams.keyMethod + ':' + keyParams.keySalt + (keyParams.lifeTime ? '|' + keyParams.lifeTime : '') + (keyParams.mkiValue && keyParams.mkiLength ? '|' + keyParams.mkiValue + ':' + keyParams.mkiLength : '');
+};
+
+// Extracts all SDES parameters.
+SDPUtils.getCryptoParameters = function (mediaSection, sessionpart) {
+  var lines = SDPUtils.matchPrefix(mediaSection + sessionpart, 'a=crypto:');
+  return lines.map(SDPUtils.parseCryptoLine);
+};
+
+// Parses ICE information from SDP media section or sessionpart.
+// FIXME: for consistency with other functions this should only
+//   get the ice-ufrag and ice-pwd lines as input.
+SDPUtils.getIceParameters = function (mediaSection, sessionpart) {
+  var ufrag = SDPUtils.matchPrefix(mediaSection + sessionpart, 'a=ice-ufrag:')[0];
+  var pwd = SDPUtils.matchPrefix(mediaSection + sessionpart, 'a=ice-pwd:')[0];
+  if (!(ufrag && pwd)) {
+    return null;
+  }
+  return {
+    usernameFragment: ufrag.substr(12),
+    password: pwd.substr(10)
+  };
+};
+
+// Serializes ICE parameters to SDP.
+SDPUtils.writeIceParameters = function (params) {
+  var sdp = 'a=ice-ufrag:' + params.usernameFragment + '\r\n' + 'a=ice-pwd:' + params.password + '\r\n';
+  if (params.iceLite) {
+    sdp += 'a=ice-lite\r\n';
+  }
+  return sdp;
+};
+
+// Parses the SDP media section and returns RTCRtpParameters.
+SDPUtils.parseRtpParameters = function (mediaSection) {
+  var description = {
+    codecs: [],
+    headerExtensions: [],
+    fecMechanisms: [],
+    rtcp: []
+  };
+  var lines = SDPUtils.splitLines(mediaSection);
+  var mline = lines[0].split(' ');
+  for (var i = 3; i < mline.length; i++) {
+    // find all codecs from mline[3..]
+    var pt = mline[i];
+    var rtpmapline = SDPUtils.matchPrefix(mediaSection, 'a=rtpmap:' + pt + ' ')[0];
+    if (rtpmapline) {
+      var codec = SDPUtils.parseRtpMap(rtpmapline);
+      var fmtps = SDPUtils.matchPrefix(mediaSection, 'a=fmtp:' + pt + ' ');
+      // Only the first a=fmtp:<pt> is considered.
+      codec.parameters = fmtps.length ? SDPUtils.parseFmtp(fmtps[0]) : {};
+      codec.rtcpFeedback = SDPUtils.matchPrefix(mediaSection, 'a=rtcp-fb:' + pt + ' ').map(SDPUtils.parseRtcpFb);
+      description.codecs.push(codec);
+      // parse FEC mechanisms from rtpmap lines.
+      switch (codec.name.toUpperCase()) {
+        case 'RED':
+        case 'ULPFEC':
+          description.fecMechanisms.push(codec.name.toUpperCase());
+          break;
+        default:
+          // only RED and ULPFEC are recognized as FEC mechanisms.
+          break;
+      }
+    }
+  }
+  SDPUtils.matchPrefix(mediaSection, 'a=extmap:').forEach(function (line) {
+    description.headerExtensions.push(SDPUtils.parseExtmap(line));
+  });
+  // FIXME: parse rtcp.
+  return description;
+};
+
+// Generates parts of the SDP media section describing the capabilities /
+// parameters.
+SDPUtils.writeRtpDescription = function (kind, caps) {
+  var sdp = '';
+
+  // Build the mline.
+  sdp += 'm=' + kind + ' ';
+  sdp += caps.codecs.length > 0 ? '9' : '0'; // reject if no codecs.
+  sdp += ' UDP/TLS/RTP/SAVPF ';
+  sdp += caps.codecs.map(function (codec) {
+    if (codec.preferredPayloadType !== undefined) {
+      return codec.preferredPayloadType;
+    }
+    return codec.payloadType;
+  }).join(' ') + '\r\n';
+
+  sdp += 'c=IN IP4 0.0.0.0\r\n';
+  sdp += 'a=rtcp:9 IN IP4 0.0.0.0\r\n';
+
+  // Add a=rtpmap lines for each codec. Also fmtp and rtcp-fb.
+  caps.codecs.forEach(function (codec) {
+    sdp += SDPUtils.writeRtpMap(codec);
+    sdp += SDPUtils.writeFmtp(codec);
+    sdp += SDPUtils.writeRtcpFb(codec);
+  });
+  var maxptime = 0;
+  caps.codecs.forEach(function (codec) {
+    if (codec.maxptime > maxptime) {
+      maxptime = codec.maxptime;
+    }
+  });
+  if (maxptime > 0) {
+    sdp += 'a=maxptime:' + maxptime + '\r\n';
+  }
+
+  if (caps.headerExtensions) {
+    caps.headerExtensions.forEach(function (extension) {
+      sdp += SDPUtils.writeExtmap(extension);
+    });
+  }
+  // FIXME: write fecMechanisms.
+  return sdp;
+};
+
+// Parses the SDP media section and returns an array of
+// RTCRtpEncodingParameters.
+SDPUtils.parseRtpEncodingParameters = function (mediaSection) {
+  var encodingParameters = [];
+  var description = SDPUtils.parseRtpParameters(mediaSection);
+  var hasRed = description.fecMechanisms.indexOf('RED') !== -1;
+  var hasUlpfec = description.fecMechanisms.indexOf('ULPFEC') !== -1;
+
+  // filter a=ssrc:... cname:, ignore PlanB-msid
+  var ssrcs = SDPUtils.matchPrefix(mediaSection, 'a=ssrc:').map(function (line) {
+    return SDPUtils.parseSsrcMedia(line);
+  }).filter(function (parts) {
+    return parts.attribute === 'cname';
+  });
+  var primarySsrc = ssrcs.length > 0 && ssrcs[0].ssrc;
+  var secondarySsrc = void 0;
+
+  var flows = SDPUtils.matchPrefix(mediaSection, 'a=ssrc-group:FID').map(function (line) {
+    var parts = line.substr(17).split(' ');
+    return parts.map(function (part) {
+      return parseInt(part, 10);
+    });
+  });
+  if (flows.length > 0 && flows[0].length > 1 && flows[0][0] === primarySsrc) {
+    secondarySsrc = flows[0][1];
+  }
+
+  description.codecs.forEach(function (codec) {
+    if (codec.name.toUpperCase() === 'RTX' && codec.parameters.apt) {
+      var encParam = {
+        ssrc: primarySsrc,
+        codecPayloadType: parseInt(codec.parameters.apt, 10)
+      };
+      if (primarySsrc && secondarySsrc) {
+        encParam.rtx = { ssrc: secondarySsrc };
+      }
+      encodingParameters.push(encParam);
+      if (hasRed) {
+        encParam = JSON.parse(JSON.stringify(encParam));
+        encParam.fec = {
+          ssrc: primarySsrc,
+          mechanism: hasUlpfec ? 'red+ulpfec' : 'red'
+        };
+        encodingParameters.push(encParam);
+      }
+    }
+  });
+  if (encodingParameters.length === 0 && primarySsrc) {
+    encodingParameters.push({
+      ssrc: primarySsrc
+    });
+  }
+
+  // we support both b=AS and b=TIAS but interpret AS as TIAS.
+  var bandwidth = SDPUtils.matchPrefix(mediaSection, 'b=');
+  if (bandwidth.length) {
+    if (bandwidth[0].indexOf('b=TIAS:') === 0) {
+      bandwidth = parseInt(bandwidth[0].substr(7), 10);
+    } else if (bandwidth[0].indexOf('b=AS:') === 0) {
+      // use formula from JSEP to convert b=AS to TIAS value.
+      bandwidth = parseInt(bandwidth[0].substr(5), 10) * 1000 * 0.95 - 50 * 40 * 8;
+    } else {
+      bandwidth = undefined;
+    }
+    encodingParameters.forEach(function (params) {
+      params.maxBitrate = bandwidth;
+    });
+  }
+  return encodingParameters;
+};
+
+// parses http://draft.ortc.org/#rtcrtcpparameters*
+SDPUtils.parseRtcpParameters = function (mediaSection) {
+  var rtcpParameters = {};
+
+  // Gets the first SSRC. Note that with RTX there might be multiple
+  // SSRCs.
+  var remoteSsrc = SDPUtils.matchPrefix(mediaSection, 'a=ssrc:').map(function (line) {
+    return SDPUtils.parseSsrcMedia(line);
+  }).filter(function (obj) {
+    return obj.attribute === 'cname';
+  })[0];
+  if (remoteSsrc) {
+    rtcpParameters.cname = remoteSsrc.value;
+    rtcpParameters.ssrc = remoteSsrc.ssrc;
+  }
+
+  // Edge uses the compound attribute instead of reducedSize
+  // compound is !reducedSize
+  var rsize = SDPUtils.matchPrefix(mediaSection, 'a=rtcp-rsize');
+  rtcpParameters.reducedSize = rsize.length > 0;
+  rtcpParameters.compound = rsize.length === 0;
+
+  // parses the rtcp-mux attrіbute.
+  // Note that Edge does not support unmuxed RTCP.
+  var mux = SDPUtils.matchPrefix(mediaSection, 'a=rtcp-mux');
+  rtcpParameters.mux = mux.length > 0;
+
+  return rtcpParameters;
+};
+
+SDPUtils.writeRtcpParameters = function (rtcpParameters) {
+  var sdp = '';
+  if (rtcpParameters.reducedSize) {
+    sdp += 'a=rtcp-rsize\r\n';
+  }
+  if (rtcpParameters.mux) {
+    sdp += 'a=rtcp-mux\r\n';
+  }
+  if (rtcpParameters.ssrc !== undefined && rtcpParameters.cname) {
+    sdp += 'a=ssrc:' + rtcpParameters.ssrc + ' cname:' + rtcpParameters.cname + '\r\n';
+  }
+  return sdp;
+};
+
+// parses either a=msid: or a=ssrc:... msid lines and returns
+// the id of the MediaStream and MediaStreamTrack.
+SDPUtils.parseMsid = function (mediaSection) {
+  var parts = void 0;
+  var spec = SDPUtils.matchPrefix(mediaSection, 'a=msid:');
+  if (spec.length === 1) {
+    parts = spec[0].substr(7).split(' ');
+    return { stream: parts[0], track: parts[1] };
+  }
+  var planB = SDPUtils.matchPrefix(mediaSection, 'a=ssrc:').map(function (line) {
+    return SDPUtils.parseSsrcMedia(line);
+  }).filter(function (msidParts) {
+    return msidParts.attribute === 'msid';
+  });
+  if (planB.length > 0) {
+    parts = planB[0].value.split(' ');
+    return { stream: parts[0], track: parts[1] };
+  }
+};
+
+// SCTP
+// parses draft-ietf-mmusic-sctp-sdp-26 first and falls back
+// to draft-ietf-mmusic-sctp-sdp-05
+SDPUtils.parseSctpDescription = function (mediaSection) {
+  var mline = SDPUtils.parseMLine(mediaSection);
+  var maxSizeLine = SDPUtils.matchPrefix(mediaSection, 'a=max-message-size:');
+  var maxMessageSize = void 0;
+  if (maxSizeLine.length > 0) {
+    maxMessageSize = parseInt(maxSizeLine[0].substr(19), 10);
+  }
+  if (isNaN(maxMessageSize)) {
+    maxMessageSize = 65536;
+  }
+  var sctpPort = SDPUtils.matchPrefix(mediaSection, 'a=sctp-port:');
+  if (sctpPort.length > 0) {
+    return {
+      port: parseInt(sctpPort[0].substr(12), 10),
+      protocol: mline.fmt,
+      maxMessageSize: maxMessageSize
+    };
+  }
+  var sctpMapLines = SDPUtils.matchPrefix(mediaSection, 'a=sctpmap:');
+  if (sctpMapLines.length > 0) {
+    var parts = sctpMapLines[0].substr(10).split(' ');
+    return {
+      port: parseInt(parts[0], 10),
+      protocol: parts[1],
+      maxMessageSize: maxMessageSize
+    };
+  }
+};
+
+// SCTP
+// outputs the draft-ietf-mmusic-sctp-sdp-26 version that all browsers
+// support by now receiving in this format, unless we originally parsed
+// as the draft-ietf-mmusic-sctp-sdp-05 format (indicated by the m-line
+// protocol of DTLS/SCTP -- without UDP/ or TCP/)
+SDPUtils.writeSctpDescription = function (media, sctp) {
+  var output = [];
+  if (media.protocol !== 'DTLS/SCTP') {
+    output = ['m=' + media.kind + ' 9 ' + media.protocol + ' ' + sctp.protocol + '\r\n', 'c=IN IP4 0.0.0.0\r\n', 'a=sctp-port:' + sctp.port + '\r\n'];
+  } else {
+    output = ['m=' + media.kind + ' 9 ' + media.protocol + ' ' + sctp.port + '\r\n', 'c=IN IP4 0.0.0.0\r\n', 'a=sctpmap:' + sctp.port + ' ' + sctp.protocol + ' 65535\r\n'];
+  }
+  if (sctp.maxMessageSize !== undefined) {
+    output.push('a=max-message-size:' + sctp.maxMessageSize + '\r\n');
+  }
+  return output.join('');
+};
+
+// Generate a session ID for SDP.
+// https://tools.ietf.org/html/draft-ietf-rtcweb-jsep-20#section-5.2.1
+// recommends using a cryptographically random +ve 64-bit value
+// but right now this should be acceptable and within the right range
+SDPUtils.generateSessionId = function () {
+  return Math.random().toString().substr(2, 21);
+};
+
+// Write boiler plate for start of SDP
+// sessId argument is optional - if not supplied it will
+// be generated randomly
+// sessVersion is optional and defaults to 2
+// sessUser is optional and defaults to 'thisisadapterortc'
+SDPUtils.writeSessionBoilerplate = function (sessId, sessVer, sessUser) {
+  var sessionId = void 0;
+  var version = sessVer !== undefined ? sessVer : 2;
+  if (sessId) {
+    sessionId = sessId;
+  } else {
+    sessionId = SDPUtils.generateSessionId();
+  }
+  var user = sessUser || 'thisisadapterortc';
+  // FIXME: sess-id should be an NTP timestamp.
+  return 'v=0\r\n' + 'o=' + user + ' ' + sessionId + ' ' + version + ' IN IP4 127.0.0.1\r\n' + 's=-\r\n' + 't=0 0\r\n';
+};
+
+// Gets the direction from the mediaSection or the sessionpart.
+SDPUtils.getDirection = function (mediaSection, sessionpart) {
+  // Look for sendrecv, sendonly, recvonly, inactive, default to sendrecv.
+  var lines = SDPUtils.splitLines(mediaSection);
+  for (var i = 0; i < lines.length; i++) {
+    switch (lines[i]) {
+      case 'a=sendrecv':
+      case 'a=sendonly':
+      case 'a=recvonly':
+      case 'a=inactive':
+        return lines[i].substr(2);
+      default:
+      // FIXME: What should happen here?
+    }
+  }
+  if (sessionpart) {
+    return SDPUtils.getDirection(sessionpart);
+  }
+  return 'sendrecv';
+};
+
+SDPUtils.getKind = function (mediaSection) {
+  var lines = SDPUtils.splitLines(mediaSection);
+  var mline = lines[0].split(' ');
+  return mline[0].substr(2);
+};
+
+SDPUtils.isRejected = function (mediaSection) {
+  return mediaSection.split(' ', 2)[1] === '0';
+};
+
+SDPUtils.parseMLine = function (mediaSection) {
+  var lines = SDPUtils.splitLines(mediaSection);
+  var parts = lines[0].substr(2).split(' ');
+  return {
+    kind: parts[0],
+    port: parseInt(parts[1], 10),
+    protocol: parts[2],
+    fmt: parts.slice(3).join(' ')
+  };
+};
+
+SDPUtils.parseOLine = function (mediaSection) {
+  var line = SDPUtils.matchPrefix(mediaSection, 'o=')[0];
+  var parts = line.substr(2).split(' ');
+  return {
+    username: parts[0],
+    sessionId: parts[1],
+    sessionVersion: parseInt(parts[2], 10),
+    netType: parts[3],
+    addressType: parts[4],
+    address: parts[5]
+  };
+};
+
+// a very naive interpretation of a valid SDP.
+SDPUtils.isValidSDP = function (blob) {
+  if (typeof blob !== 'string' || blob.length === 0) {
+    return false;
+  }
+  var lines = SDPUtils.splitLines(blob);
+  for (var i = 0; i < lines.length; i++) {
+    if (lines[i].length < 2 || lines[i].charAt(1) !== '=') {
+      return false;
+    }
+    // TODO: check the modifier a bit more.
+  }
+  return true;
+};
+
+// Expose public methods.
+if ((typeof module === 'undefined' ? 'undefined' : _typeof(module)) === 'object') {
+  module.exports = SDPUtils;
+}
+},{}]},{},[1])(1)
+});
diff --git a/dist/socket.io.js b/dist/socket.io.js
new file mode 100644
index 0000000..ff72133
--- /dev/null
+++ b/dist/socket.io.js
@@ -0,0 +1,4240 @@
+/*!
+ * Socket.IO v4.4.1
+ * (c) 2014-2022 Guillermo Rauch
+ * Released under the MIT License.
+ */
+(function (global, factory) {
+  typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
+  typeof define === 'function' && define.amd ? define(factory) :
+  (global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.io = factory());
+})(this, (function () { 'use strict';
+
+  function _typeof(obj) {
+    "@babel/helpers - typeof";
+
+    if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") {
+      _typeof = function (obj) {
+        return typeof obj;
+      };
+    } else {
+      _typeof = function (obj) {
+        return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
+      };
+    }
+
+    return _typeof(obj);
+  }
+
+  function _classCallCheck(instance, Constructor) {
+    if (!(instance instanceof Constructor)) {
+      throw new TypeError("Cannot call a class as a function");
+    }
+  }
+
+  function _defineProperties(target, props) {
+    for (var i = 0; i < props.length; i++) {
+      var descriptor = props[i];
+      descriptor.enumerable = descriptor.enumerable || false;
+      descriptor.configurable = true;
+      if ("value" in descriptor) descriptor.writable = true;
+      Object.defineProperty(target, descriptor.key, descriptor);
+    }
+  }
+
+  function _createClass(Constructor, protoProps, staticProps) {
+    if (protoProps) _defineProperties(Constructor.prototype, protoProps);
+    if (staticProps) _defineProperties(Constructor, staticProps);
+    return Constructor;
+  }
+
+  function _extends() {
+    _extends = Object.assign || function (target) {
+      for (var i = 1; i < arguments.length; i++) {
+        var source = arguments[i];
+
+        for (var key in source) {
+          if (Object.prototype.hasOwnProperty.call(source, key)) {
+            target[key] = source[key];
+          }
+        }
+      }
+
+      return target;
+    };
+
+    return _extends.apply(this, arguments);
+  }
+
+  function _inherits(subClass, superClass) {
+    if (typeof superClass !== "function" && superClass !== null) {
+      throw new TypeError("Super expression must either be null or a function");
+    }
+
+    subClass.prototype = Object.create(superClass && superClass.prototype, {
+      constructor: {
+        value: subClass,
+        writable: true,
+        configurable: true
+      }
+    });
+    if (superClass) _setPrototypeOf(subClass, superClass);
+  }
+
+  function _getPrototypeOf(o) {
+    _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) {
+      return o.__proto__ || Object.getPrototypeOf(o);
+    };
+    return _getPrototypeOf(o);
+  }
+
+  function _setPrototypeOf(o, p) {
+    _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {
+      o.__proto__ = p;
+      return o;
+    };
+
+    return _setPrototypeOf(o, p);
+  }
+
+  function _isNativeReflectConstruct() {
+    if (typeof Reflect === "undefined" || !Reflect.construct) return false;
+    if (Reflect.construct.sham) return false;
+    if (typeof Proxy === "function") return true;
+
+    try {
+      Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {}));
+      return true;
+    } catch (e) {
+      return false;
+    }
+  }
+
+  function _assertThisInitialized(self) {
+    if (self === void 0) {
+      throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
+    }
+
+    return self;
+  }
+
+  function _possibleConstructorReturn(self, call) {
+    if (call && (typeof call === "object" || typeof call === "function")) {
+      return call;
+    } else if (call !== void 0) {
+      throw new TypeError("Derived constructors may only return object or undefined");
+    }
+
+    return _assertThisInitialized(self);
+  }
+
+  function _createSuper(Derived) {
+    var hasNativeReflectConstruct = _isNativeReflectConstruct();
+
+    return function _createSuperInternal() {
+      var Super = _getPrototypeOf(Derived),
+          result;
+
+      if (hasNativeReflectConstruct) {
+        var NewTarget = _getPrototypeOf(this).constructor;
+
+        result = Reflect.construct(Super, arguments, NewTarget);
+      } else {
+        result = Super.apply(this, arguments);
+      }
+
+      return _possibleConstructorReturn(this, result);
+    };
+  }
+
+  function _superPropBase(object, property) {
+    while (!Object.prototype.hasOwnProperty.call(object, property)) {
+      object = _getPrototypeOf(object);
+      if (object === null) break;
+    }
+
+    return object;
+  }
+
+  function _get(target, property, receiver) {
+    if (typeof Reflect !== "undefined" && Reflect.get) {
+      _get = Reflect.get;
+    } else {
+      _get = function _get(target, property, receiver) {
+        var base = _superPropBase(target, property);
+
+        if (!base) return;
+        var desc = Object.getOwnPropertyDescriptor(base, property);
+
+        if (desc.get) {
+          return desc.get.call(receiver);
+        }
+
+        return desc.value;
+      };
+    }
+
+    return _get(target, property, receiver || target);
+  }
+
+  function _unsupportedIterableToArray(o, minLen) {
+    if (!o) return;
+    if (typeof o === "string") return _arrayLikeToArray(o, minLen);
+    var n = Object.prototype.toString.call(o).slice(8, -1);
+    if (n === "Object" && o.constructor) n = o.constructor.name;
+    if (n === "Map" || n === "Set") return Array.from(o);
+    if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen);
+  }
+
+  function _arrayLikeToArray(arr, len) {
+    if (len == null || len > arr.length) len = arr.length;
+
+    for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i];
+
+    return arr2;
+  }
+
+  function _createForOfIteratorHelper(o, allowArrayLike) {
+    var it = typeof Symbol !== "undefined" && o[Symbol.iterator] || o["@@iterator"];
+
+    if (!it) {
+      if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") {
+        if (it) o = it;
+        var i = 0;
+
+        var F = function () {};
+
+        return {
+          s: F,
+          n: function () {
+            if (i >= o.length) return {
+              done: true
+            };
+            return {
+              done: false,
+              value: o[i++]
+            };
+          },
+          e: function (e) {
+            throw e;
+          },
+          f: F
+        };
+      }
+
+      throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
+    }
+
+    var normalCompletion = true,
+        didErr = false,
+        err;
+    return {
+      s: function () {
+        it = it.call(o);
+      },
+      n: function () {
+        var step = it.next();
+        normalCompletion = step.done;
+        return step;
+      },
+      e: function (e) {
+        didErr = true;
+        err = e;
+      },
+      f: function () {
+        try {
+          if (!normalCompletion && it.return != null) it.return();
+        } finally {
+          if (didErr) throw err;
+        }
+      }
+    };
+  }
+
+  /**
+   * Parses an URI
+   *
+   * @author Steven Levithan <stevenlevithan.com> (MIT license)
+   * @api private
+   */
+  var re = /^(?:(?![^:@]+:[^:@\/]*@)(http|https|ws|wss):\/\/)?((?:(([^:@]*)(?::([^:@]*))?)?@)?((?:[a-f0-9]{0,4}:){2,7}[a-f0-9]{0,4}|[^:\/?#]*)(?::(\d*))?)(((\/(?:[^?#](?![^?#\/]*\.[^?#\/.]+(?:[?#]|$)))*\/?)?([^?#\/]*))(?:\?([^#]*))?(?:#(.*))?)/;
+  var parts = ['source', 'protocol', 'authority', 'userInfo', 'user', 'password', 'host', 'port', 'relative', 'path', 'directory', 'file', 'query', 'anchor'];
+
+  var parseuri = function parseuri(str) {
+    var src = str,
+        b = str.indexOf('['),
+        e = str.indexOf(']');
+
+    if (b != -1 && e != -1) {
+      str = str.substring(0, b) + str.substring(b, e).replace(/:/g, ';') + str.substring(e, str.length);
+    }
+
+    var m = re.exec(str || ''),
+        uri = {},
+        i = 14;
+
+    while (i--) {
+      uri[parts[i]] = m[i] || '';
+    }
+
+    if (b != -1 && e != -1) {
+      uri.source = src;
+      uri.host = uri.host.substring(1, uri.host.length - 1).replace(/;/g, ':');
+      uri.authority = uri.authority.replace('[', '').replace(']', '').replace(/;/g, ':');
+      uri.ipv6uri = true;
+    }
+
+    uri.pathNames = pathNames(uri, uri['path']);
+    uri.queryKey = queryKey(uri, uri['query']);
+    return uri;
+  };
+
+  function pathNames(obj, path) {
+    var regx = /\/{2,9}/g,
+        names = path.replace(regx, "/").split("/");
+
+    if (path.substr(0, 1) == '/' || path.length === 0) {
+      names.splice(0, 1);
+    }
+
+    if (path.substr(path.length - 1, 1) == '/') {
+      names.splice(names.length - 1, 1);
+    }
+
+    return names;
+  }
+
+  function queryKey(uri, query) {
+    var data = {};
+    query.replace(/(?:^|&)([^&=]*)=?([^&]*)/g, function ($0, $1, $2) {
+      if ($1) {
+        data[$1] = $2;
+      }
+    });
+    return data;
+  }
+
+  /**
+   * URL parser.
+   *
+   * @param uri - url
+   * @param path - the request path of the connection
+   * @param loc - An object meant to mimic window.location.
+   *        Defaults to window.location.
+   * @public
+   */
+
+  function url(uri) {
+    var path = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : "";
+    var loc = arguments.length > 2 ? arguments[2] : undefined;
+    var obj = uri; // default to window.location
+
+    loc = loc || typeof location !== "undefined" && location;
+    if (null == uri) uri = loc.protocol + "//" + loc.host; // relative path support
+
+    if (typeof uri === "string") {
+      if ("/" === uri.charAt(0)) {
+        if ("/" === uri.charAt(1)) {
+          uri = loc.protocol + uri;
+        } else {
+          uri = loc.host + uri;
+        }
+      }
+
+      if (!/^(https?|wss?):\/\//.test(uri)) {
+        if ("undefined" !== typeof loc) {
+          uri = loc.protocol + "//" + uri;
+        } else {
+          uri = "https://" + uri;
+        }
+      } // parse
+
+
+      obj = parseuri(uri);
+    } // make sure we treat `localhost:80` and `localhost` equally
+
+
+    if (!obj.port) {
+      if (/^(http|ws)$/.test(obj.protocol)) {
+        obj.port = "80";
+      } else if (/^(http|ws)s$/.test(obj.protocol)) {
+        obj.port = "443";
+      }
+    }
+
+    obj.path = obj.path || "/";
+    var ipv6 = obj.host.indexOf(":") !== -1;
+    var host = ipv6 ? "[" + obj.host + "]" : obj.host; // define unique id
+
+    obj.id = obj.protocol + "://" + host + ":" + obj.port + path; // define href
+
+    obj.href = obj.protocol + "://" + host + (loc && loc.port === obj.port ? "" : ":" + obj.port);
+    return obj;
+  }
+
+  var hasCors = {exports: {}};
+
+  /**
+   * Module exports.
+   *
+   * Logic borrowed from Modernizr:
+   *
+   *   - https://github.com/Modernizr/Modernizr/blob/master/feature-detects/cors.js
+   */
+
+  try {
+    hasCors.exports = typeof XMLHttpRequest !== 'undefined' && 'withCredentials' in new XMLHttpRequest();
+  } catch (err) {
+    // if XMLHttp support is disabled in IE then it will throw
+    // when trying to create
+    hasCors.exports = false;
+  }
+
+  var hasCORS = hasCors.exports;
+
+  var globalThis = (function () {
+    if (typeof self !== "undefined") {
+      return self;
+    } else if (typeof window !== "undefined") {
+      return window;
+    } else {
+      return Function("return this")();
+    }
+  })();
+
+  // browser shim for xmlhttprequest module
+  function XMLHttpRequest$1 (opts) {
+    var xdomain = opts.xdomain; // XMLHttpRequest can be disabled on IE
+
+    try {
+      if ("undefined" !== typeof XMLHttpRequest && (!xdomain || hasCORS)) {
+        return new XMLHttpRequest();
+      }
+    } catch (e) {}
+
+    if (!xdomain) {
+      try {
+        return new globalThis[["Active"].concat("Object").join("X")]("Microsoft.XMLHTTP");
+      } catch (e) {}
+    }
+  }
+
+  function pick(obj) {
+    for (var _len = arguments.length, attr = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
+      attr[_key - 1] = arguments[_key];
+    }
+
+    return attr.reduce(function (acc, k) {
+      if (obj.hasOwnProperty(k)) {
+        acc[k] = obj[k];
+      }
+
+      return acc;
+    }, {});
+  } // Keep a reference to the real timeout functions so they can be used when overridden
+
+  var NATIVE_SET_TIMEOUT = setTimeout;
+  var NATIVE_CLEAR_TIMEOUT = clearTimeout;
+  function installTimerFunctions(obj, opts) {
+    if (opts.useNativeTimers) {
+      obj.setTimeoutFn = NATIVE_SET_TIMEOUT.bind(globalThis);
+      obj.clearTimeoutFn = NATIVE_CLEAR_TIMEOUT.bind(globalThis);
+    } else {
+      obj.setTimeoutFn = setTimeout.bind(globalThis);
+      obj.clearTimeoutFn = clearTimeout.bind(globalThis);
+    }
+  }
+
+  /**
+   * Expose `Emitter`.
+   */
+
+  var Emitter_1 = Emitter;
+  /**
+   * Initialize a new `Emitter`.
+   *
+   * @api public
+   */
+
+  function Emitter(obj) {
+    if (obj) return mixin(obj);
+  }
+  /**
+   * Mixin the emitter properties.
+   *
+   * @param {Object} obj
+   * @return {Object}
+   * @api private
+   */
+
+
+  function mixin(obj) {
+    for (var key in Emitter.prototype) {
+      obj[key] = Emitter.prototype[key];
+    }
+
+    return obj;
+  }
+  /**
+   * Listen on the given `event` with `fn`.
+   *
+   * @param {String} event
+   * @param {Function} fn
+   * @return {Emitter}
+   * @api public
+   */
+
+
+  Emitter.prototype.on = Emitter.prototype.addEventListener = function (event, fn) {
+    this._callbacks = this._callbacks || {};
+    (this._callbacks['$' + event] = this._callbacks['$' + event] || []).push(fn);
+    return this;
+  };
+  /**
+   * Adds an `event` listener that will be invoked a single
+   * time then automatically removed.
+   *
+   * @param {String} event
+   * @param {Function} fn
+   * @return {Emitter}
+   * @api public
+   */
+
+
+  Emitter.prototype.once = function (event, fn) {
+    function on() {
+      this.off(event, on);
+      fn.apply(this, arguments);
+    }
+
+    on.fn = fn;
+    this.on(event, on);
+    return this;
+  };
+  /**
+   * Remove the given callback for `event` or all
+   * registered callbacks.
+   *
+   * @param {String} event
+   * @param {Function} fn
+   * @return {Emitter}
+   * @api public
+   */
+
+
+  Emitter.prototype.off = Emitter.prototype.removeListener = Emitter.prototype.removeAllListeners = Emitter.prototype.removeEventListener = function (event, fn) {
+    this._callbacks = this._callbacks || {}; // all
+
+    if (0 == arguments.length) {
+      this._callbacks = {};
+      return this;
+    } // specific event
+
+
+    var callbacks = this._callbacks['$' + event];
+    if (!callbacks) return this; // remove all handlers
+
+    if (1 == arguments.length) {
+      delete this._callbacks['$' + event];
+      return this;
+    } // remove specific handler
+
+
+    var cb;
+
+    for (var i = 0; i < callbacks.length; i++) {
+      cb = callbacks[i];
+
+      if (cb === fn || cb.fn === fn) {
+        callbacks.splice(i, 1);
+        break;
+      }
+    } // Remove event specific arrays for event types that no
+    // one is subscribed for to avoid memory leak.
+
+
+    if (callbacks.length === 0) {
+      delete this._callbacks['$' + event];
+    }
+
+    return this;
+  };
+  /**
+   * Emit `event` with the given args.
+   *
+   * @param {String} event
+   * @param {Mixed} ...
+   * @return {Emitter}
+   */
+
+
+  Emitter.prototype.emit = function (event) {
+    this._callbacks = this._callbacks || {};
+    var args = new Array(arguments.length - 1),
+        callbacks = this._callbacks['$' + event];
+
+    for (var i = 1; i < arguments.length; i++) {
+      args[i - 1] = arguments[i];
+    }
+
+    if (callbacks) {
+      callbacks = callbacks.slice(0);
+
+      for (var i = 0, len = callbacks.length; i < len; ++i) {
+        callbacks[i].apply(this, args);
+      }
+    }
+
+    return this;
+  }; // alias used for reserved events (protected method)
+
+
+  Emitter.prototype.emitReserved = Emitter.prototype.emit;
+  /**
+   * Return array of callbacks for `event`.
+   *
+   * @param {String} event
+   * @return {Array}
+   * @api public
+   */
+
+  Emitter.prototype.listeners = function (event) {
+    this._callbacks = this._callbacks || {};
+    return this._callbacks['$' + event] || [];
+  };
+  /**
+   * Check if this emitter has `event` handlers.
+   *
+   * @param {String} event
+   * @return {Boolean}
+   * @api public
+   */
+
+
+  Emitter.prototype.hasListeners = function (event) {
+    return !!this.listeners(event).length;
+  };
+
+  var PACKET_TYPES = Object.create(null); // no Map = no polyfill
+
+  PACKET_TYPES["open"] = "0";
+  PACKET_TYPES["close"] = "1";
+  PACKET_TYPES["ping"] = "2";
+  PACKET_TYPES["pong"] = "3";
+  PACKET_TYPES["message"] = "4";
+  PACKET_TYPES["upgrade"] = "5";
+  PACKET_TYPES["noop"] = "6";
+  var PACKET_TYPES_REVERSE = Object.create(null);
+  Object.keys(PACKET_TYPES).forEach(function (key) {
+    PACKET_TYPES_REVERSE[PACKET_TYPES[key]] = key;
+  });
+  var ERROR_PACKET = {
+    type: "error",
+    data: "parser error"
+  };
+
+  var withNativeBlob$1 = typeof Blob === "function" || typeof Blob !== "undefined" && Object.prototype.toString.call(Blob) === "[object BlobConstructor]";
+  var withNativeArrayBuffer$2 = typeof ArrayBuffer === "function"; // ArrayBuffer.isView method is not defined in IE10
+
+  var isView$1 = function isView(obj) {
+    return typeof ArrayBuffer.isView === "function" ? ArrayBuffer.isView(obj) : obj && obj.buffer instanceof ArrayBuffer;
+  };
+
+  var encodePacket = function encodePacket(_ref, supportsBinary, callback) {
+    var type = _ref.type,
+        data = _ref.data;
+
+    if (withNativeBlob$1 && data instanceof Blob) {
+      if (supportsBinary) {
+        return callback(data);
+      } else {
+        return encodeBlobAsBase64(data, callback);
+      }
+    } else if (withNativeArrayBuffer$2 && (data instanceof ArrayBuffer || isView$1(data))) {
+      if (supportsBinary) {
+        return callback(data);
+      } else {
+        return encodeBlobAsBase64(new Blob([data]), callback);
+      }
+    } // plain string
+
+
+    return callback(PACKET_TYPES[type] + (data || ""));
+  };
+
+  var encodeBlobAsBase64 = function encodeBlobAsBase64(data, callback) {
+    var fileReader = new FileReader();
+
+    fileReader.onload = function () {
+      var content = fileReader.result.split(",")[1];
+      callback("b" + content);
+    };
+
+    return fileReader.readAsDataURL(data);
+  };
+
+  /*
+   * base64-arraybuffer 1.0.1 <https://github.com/niklasvh/base64-arraybuffer>
+   * Copyright (c) 2021 Niklas von Hertzen <https://hertzen.com>
+   * Released under MIT License
+   */
+  var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'; // Use a lookup table to find the index.
+
+  var lookup$1 = typeof Uint8Array === 'undefined' ? [] : new Uint8Array(256);
+
+  for (var i$1 = 0; i$1 < chars.length; i$1++) {
+    lookup$1[chars.charCodeAt(i$1)] = i$1;
+  }
+
+  var decode$1 = function decode(base64) {
+    var bufferLength = base64.length * 0.75,
+        len = base64.length,
+        i,
+        p = 0,
+        encoded1,
+        encoded2,
+        encoded3,
+        encoded4;
+
+    if (base64[base64.length - 1] === '=') {
+      bufferLength--;
+
+      if (base64[base64.length - 2] === '=') {
+        bufferLength--;
+      }
+    }
+
+    var arraybuffer = new ArrayBuffer(bufferLength),
+        bytes = new Uint8Array(arraybuffer);
+
+    for (i = 0; i < len; i += 4) {
+      encoded1 = lookup$1[base64.charCodeAt(i)];
+      encoded2 = lookup$1[base64.charCodeAt(i + 1)];
+      encoded3 = lookup$1[base64.charCodeAt(i + 2)];
+      encoded4 = lookup$1[base64.charCodeAt(i + 3)];
+      bytes[p++] = encoded1 << 2 | encoded2 >> 4;
+      bytes[p++] = (encoded2 & 15) << 4 | encoded3 >> 2;
+      bytes[p++] = (encoded3 & 3) << 6 | encoded4 & 63;
+    }
+
+    return arraybuffer;
+  };
+
+  var withNativeArrayBuffer$1 = typeof ArrayBuffer === "function";
+
+  var decodePacket = function decodePacket(encodedPacket, binaryType) {
+    if (typeof encodedPacket !== "string") {
+      return {
+        type: "message",
+        data: mapBinary(encodedPacket, binaryType)
+      };
+    }
+
+    var type = encodedPacket.charAt(0);
+
+    if (type === "b") {
+      return {
+        type: "message",
+        data: decodeBase64Packet(encodedPacket.substring(1), binaryType)
+      };
+    }
+
+    var packetType = PACKET_TYPES_REVERSE[type];
+
+    if (!packetType) {
+      return ERROR_PACKET;
+    }
+
+    return encodedPacket.length > 1 ? {
+      type: PACKET_TYPES_REVERSE[type],
+      data: encodedPacket.substring(1)
+    } : {
+      type: PACKET_TYPES_REVERSE[type]
+    };
+  };
+
+  var decodeBase64Packet = function decodeBase64Packet(data, binaryType) {
+    if (withNativeArrayBuffer$1) {
+      var decoded = decode$1(data);
+      return mapBinary(decoded, binaryType);
+    } else {
+      return {
+        base64: true,
+        data: data
+      }; // fallback for old browsers
+    }
+  };
+
+  var mapBinary = function mapBinary(data, binaryType) {
+    switch (binaryType) {
+      case "blob":
+        return data instanceof ArrayBuffer ? new Blob([data]) : data;
+
+      case "arraybuffer":
+      default:
+        return data;
+      // assuming the data is already an ArrayBuffer
+    }
+  };
+
+  var SEPARATOR = String.fromCharCode(30); // see https://en.wikipedia.org/wiki/Delimiter#ASCII_delimited_text
+
+  var encodePayload = function encodePayload(packets, callback) {
+    // some packets may be added to the array while encoding, so the initial length must be saved
+    var length = packets.length;
+    var encodedPackets = new Array(length);
+    var count = 0;
+    packets.forEach(function (packet, i) {
+      // force base64 encoding for binary packets
+      encodePacket(packet, false, function (encodedPacket) {
+        encodedPackets[i] = encodedPacket;
+
+        if (++count === length) {
+          callback(encodedPackets.join(SEPARATOR));
+        }
+      });
+    });
+  };
+
+  var decodePayload = function decodePayload(encodedPayload, binaryType) {
+    var encodedPackets = encodedPayload.split(SEPARATOR);
+    var packets = [];
+
+    for (var i = 0; i < encodedPackets.length; i++) {
+      var decodedPacket = decodePacket(encodedPackets[i], binaryType);
+      packets.push(decodedPacket);
+
+      if (decodedPacket.type === "error") {
+        break;
+      }
+    }
+
+    return packets;
+  };
+
+  var protocol$1 = 4;
+
+  var Transport = /*#__PURE__*/function (_Emitter) {
+    _inherits(Transport, _Emitter);
+
+    var _super = _createSuper(Transport);
+
+    /**
+     * Transport abstract constructor.
+     *
+     * @param {Object} options.
+     * @api private
+     */
+    function Transport(opts) {
+      var _this;
+
+      _classCallCheck(this, Transport);
+
+      _this = _super.call(this);
+      _this.writable = false;
+      installTimerFunctions(_assertThisInitialized(_this), opts);
+      _this.opts = opts;
+      _this.query = opts.query;
+      _this.readyState = "";
+      _this.socket = opts.socket;
+      return _this;
+    }
+    /**
+     * Emits an error.
+     *
+     * @param {String} str
+     * @return {Transport} for chaining
+     * @api protected
+     */
+
+
+    _createClass(Transport, [{
+      key: "onError",
+      value: function onError(msg, desc) {
+        var err = new Error(msg); // @ts-ignore
+
+        err.type = "TransportError"; // @ts-ignore
+
+        err.description = desc;
+
+        _get(_getPrototypeOf(Transport.prototype), "emit", this).call(this, "error", err);
+
+        return this;
+      }
+      /**
+       * Opens the transport.
+       *
+       * @api public
+       */
+
+    }, {
+      key: "open",
+      value: function open() {
+        if ("closed" === this.readyState || "" === this.readyState) {
+          this.readyState = "opening";
+          this.doOpen();
+        }
+
+        return this;
+      }
+      /**
+       * Closes the transport.
+       *
+       * @api public
+       */
+
+    }, {
+      key: "close",
+      value: function close() {
+        if ("opening" === this.readyState || "open" === this.readyState) {
+          this.doClose();
+          this.onClose();
+        }
+
+        return this;
+      }
+      /**
+       * Sends multiple packets.
+       *
+       * @param {Array} packets
+       * @api public
+       */
+
+    }, {
+      key: "send",
+      value: function send(packets) {
+        if ("open" === this.readyState) {
+          this.write(packets);
+        }
+      }
+      /**
+       * Called upon open
+       *
+       * @api protected
+       */
+
+    }, {
+      key: "onOpen",
+      value: function onOpen() {
+        this.readyState = "open";
+        this.writable = true;
+
+        _get(_getPrototypeOf(Transport.prototype), "emit", this).call(this, "open");
+      }
+      /**
+       * Called with data.
+       *
+       * @param {String} data
+       * @api protected
+       */
+
+    }, {
+      key: "onData",
+      value: function onData(data) {
+        var packet = decodePacket(data, this.socket.binaryType);
+        this.onPacket(packet);
+      }
+      /**
+       * Called with a decoded packet.
+       *
+       * @api protected
+       */
+
+    }, {
+      key: "onPacket",
+      value: function onPacket(packet) {
+        _get(_getPrototypeOf(Transport.prototype), "emit", this).call(this, "packet", packet);
+      }
+      /**
+       * Called upon close.
+       *
+       * @api protected
+       */
+
+    }, {
+      key: "onClose",
+      value: function onClose() {
+        this.readyState = "closed";
+
+        _get(_getPrototypeOf(Transport.prototype), "emit", this).call(this, "close");
+      }
+    }]);
+
+    return Transport;
+  }(Emitter_1);
+
+  var alphabet = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz-_'.split(''),
+      length = 64,
+      map = {},
+      seed = 0,
+      i = 0,
+      prev;
+  /**
+   * Return a string representing the specified number.
+   *
+   * @param {Number} num The number to convert.
+   * @returns {String} The string representation of the number.
+   * @api public
+   */
+
+  function encode(num) {
+    var encoded = '';
+
+    do {
+      encoded = alphabet[num % length] + encoded;
+      num = Math.floor(num / length);
+    } while (num > 0);
+
+    return encoded;
+  }
+  /**
+   * Return the integer value specified by the given string.
+   *
+   * @param {String} str The string to convert.
+   * @returns {Number} The integer value represented by the string.
+   * @api public
+   */
+
+
+  function decode(str) {
+    var decoded = 0;
+
+    for (i = 0; i < str.length; i++) {
+      decoded = decoded * length + map[str.charAt(i)];
+    }
+
+    return decoded;
+  }
+  /**
+   * Yeast: A tiny growing id generator.
+   *
+   * @returns {String} A unique id.
+   * @api public
+   */
+
+
+  function yeast() {
+    var now = encode(+new Date());
+    if (now !== prev) return seed = 0, prev = now;
+    return now + '.' + encode(seed++);
+  } //
+  // Map each character to its index.
+  //
+
+
+  for (; i < length; i++) {
+    map[alphabet[i]] = i;
+  } //
+  // Expose the `yeast`, `encode` and `decode` functions.
+  //
+
+
+  yeast.encode = encode;
+  yeast.decode = decode;
+  var yeast_1 = yeast;
+
+  var parseqs = {};
+
+  /**
+   * Compiles a querystring
+   * Returns string representation of the object
+   *
+   * @param {Object}
+   * @api private
+   */
+
+  parseqs.encode = function (obj) {
+    var str = '';
+
+    for (var i in obj) {
+      if (obj.hasOwnProperty(i)) {
+        if (str.length) str += '&';
+        str += encodeURIComponent(i) + '=' + encodeURIComponent(obj[i]);
+      }
+    }
+
+    return str;
+  };
+  /**
+   * Parses a simple querystring into an object
+   *
+   * @param {String} qs
+   * @api private
+   */
+
+
+  parseqs.decode = function (qs) {
+    var qry = {};
+    var pairs = qs.split('&');
+
+    for (var i = 0, l = pairs.length; i < l; i++) {
+      var pair = pairs[i].split('=');
+      qry[decodeURIComponent(pair[0])] = decodeURIComponent(pair[1]);
+    }
+
+    return qry;
+  };
+
+  var Polling = /*#__PURE__*/function (_Transport) {
+    _inherits(Polling, _Transport);
+
+    var _super = _createSuper(Polling);
+
+    function Polling() {
+      var _this;
+
+      _classCallCheck(this, Polling);
+
+      _this = _super.apply(this, arguments);
+      _this.polling = false;
+      return _this;
+    }
+    /**
+     * Transport name.
+     */
+
+
+    _createClass(Polling, [{
+      key: "name",
+      get: function get() {
+        return "polling";
+      }
+      /**
+       * Opens the socket (triggers polling). We write a PING message to determine
+       * when the transport is open.
+       *
+       * @api private
+       */
+
+    }, {
+      key: "doOpen",
+      value: function doOpen() {
+        this.poll();
+      }
+      /**
+       * Pauses polling.
+       *
+       * @param {Function} callback upon buffers are flushed and transport is paused
+       * @api private
+       */
+
+    }, {
+      key: "pause",
+      value: function pause(onPause) {
+        var _this2 = this;
+
+        this.readyState = "pausing";
+
+        var pause = function pause() {
+          _this2.readyState = "paused";
+          onPause();
+        };
+
+        if (this.polling || !this.writable) {
+          var total = 0;
+
+          if (this.polling) {
+            total++;
+            this.once("pollComplete", function () {
+              --total || pause();
+            });
+          }
+
+          if (!this.writable) {
+            total++;
+            this.once("drain", function () {
+              --total || pause();
+            });
+          }
+        } else {
+          pause();
+        }
+      }
+      /**
+       * Starts polling cycle.
+       *
+       * @api public
+       */
+
+    }, {
+      key: "poll",
+      value: function poll() {
+        this.polling = true;
+        this.doPoll();
+        this.emit("poll");
+      }
+      /**
+       * Overloads onData to detect payloads.
+       *
+       * @api private
+       */
+
+    }, {
+      key: "onData",
+      value: function onData(data) {
+        var _this3 = this;
+
+        var callback = function callback(packet) {
+          // if its the first message we consider the transport open
+          if ("opening" === _this3.readyState && packet.type === "open") {
+            _this3.onOpen();
+          } // if its a close packet, we close the ongoing requests
+
+
+          if ("close" === packet.type) {
+            _this3.onClose();
+
+            return false;
+          } // otherwise bypass onData and handle the message
+
+
+          _this3.onPacket(packet);
+        }; // decode payload
+
+
+        decodePayload(data, this.socket.binaryType).forEach(callback); // if an event did not trigger closing
+
+        if ("closed" !== this.readyState) {
+          // if we got data we're not polling
+          this.polling = false;
+          this.emit("pollComplete");
+
+          if ("open" === this.readyState) {
+            this.poll();
+          }
+        }
+      }
+      /**
+       * For polling, send a close packet.
+       *
+       * @api private
+       */
+
+    }, {
+      key: "doClose",
+      value: function doClose() {
+        var _this4 = this;
+
+        var close = function close() {
+          _this4.write([{
+            type: "close"
+          }]);
+        };
+
+        if ("open" === this.readyState) {
+          close();
+        } else {
+          // in case we're trying to close while
+          // handshaking is in progress (GH-164)
+          this.once("open", close);
+        }
+      }
+      /**
+       * Writes a packets payload.
+       *
+       * @param {Array} data packets
+       * @param {Function} drain callback
+       * @api private
+       */
+
+    }, {
+      key: "write",
+      value: function write(packets) {
+        var _this5 = this;
+
+        this.writable = false;
+        encodePayload(packets, function (data) {
+          _this5.doWrite(data, function () {
+            _this5.writable = true;
+
+            _this5.emit("drain");
+          });
+        });
+      }
+      /**
+       * Generates uri for connection.
+       *
+       * @api private
+       */
+
+    }, {
+      key: "uri",
+      value: function uri() {
+        var query = this.query || {};
+        var schema = this.opts.secure ? "https" : "http";
+        var port = ""; // cache busting is forced
+
+        if (false !== this.opts.timestampRequests) {
+          query[this.opts.timestampParam] = yeast_1();
+        }
+
+        if (!this.supportsBinary && !query.sid) {
+          query.b64 = 1;
+        } // avoid port if default for schema
+
+
+        if (this.opts.port && ("https" === schema && Number(this.opts.port) !== 443 || "http" === schema && Number(this.opts.port) !== 80)) {
+          port = ":" + this.opts.port;
+        }
+
+        var encodedQuery = parseqs.encode(query);
+        var ipv6 = this.opts.hostname.indexOf(":") !== -1;
+        return schema + "://" + (ipv6 ? "[" + this.opts.hostname + "]" : this.opts.hostname) + port + this.opts.path + (encodedQuery.length ? "?" + encodedQuery : "");
+      }
+    }]);
+
+    return Polling;
+  }(Transport);
+
+  /**
+   * Empty function
+   */
+
+  function empty() {}
+
+  var hasXHR2 = function () {
+    var xhr = new XMLHttpRequest$1({
+      xdomain: false
+    });
+    return null != xhr.responseType;
+  }();
+
+  var XHR = /*#__PURE__*/function (_Polling) {
+    _inherits(XHR, _Polling);
+
+    var _super = _createSuper(XHR);
+
+    /**
+     * XHR Polling constructor.
+     *
+     * @param {Object} opts
+     * @api public
+     */
+    function XHR(opts) {
+      var _this;
+
+      _classCallCheck(this, XHR);
+
+      _this = _super.call(this, opts);
+
+      if (typeof location !== "undefined") {
+        var isSSL = "https:" === location.protocol;
+        var port = location.port; // some user agents have empty `location.port`
+
+        if (!port) {
+          port = isSSL ? "443" : "80";
+        }
+
+        _this.xd = typeof location !== "undefined" && opts.hostname !== location.hostname || port !== opts.port;
+        _this.xs = opts.secure !== isSSL;
+      }
+      /**
+       * XHR supports binary
+       */
+
+
+      var forceBase64 = opts && opts.forceBase64;
+      _this.supportsBinary = hasXHR2 && !forceBase64;
+      return _this;
+    }
+    /**
+     * Creates a request.
+     *
+     * @param {String} method
+     * @api private
+     */
+
+
+    _createClass(XHR, [{
+      key: "request",
+      value: function request() {
+        var opts = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
+
+        _extends(opts, {
+          xd: this.xd,
+          xs: this.xs
+        }, this.opts);
+
+        return new Request(this.uri(), opts);
+      }
+      /**
+       * Sends data.
+       *
+       * @param {String} data to send.
+       * @param {Function} called upon flush.
+       * @api private
+       */
+
+    }, {
+      key: "doWrite",
+      value: function doWrite(data, fn) {
+        var _this2 = this;
+
+        var req = this.request({
+          method: "POST",
+          data: data
+        });
+        req.on("success", fn);
+        req.on("error", function (err) {
+          _this2.onError("xhr post error", err);
+        });
+      }
+      /**
+       * Starts a poll cycle.
+       *
+       * @api private
+       */
+
+    }, {
+      key: "doPoll",
+      value: function doPoll() {
+        var _this3 = this;
+
+        var req = this.request();
+        req.on("data", this.onData.bind(this));
+        req.on("error", function (err) {
+          _this3.onError("xhr poll error", err);
+        });
+        this.pollXhr = req;
+      }
+    }]);
+
+    return XHR;
+  }(Polling);
+  var Request = /*#__PURE__*/function (_Emitter) {
+    _inherits(Request, _Emitter);
+
+    var _super2 = _createSuper(Request);
+
+    /**
+     * Request constructor
+     *
+     * @param {Object} options
+     * @api public
+     */
+    function Request(uri, opts) {
+      var _this4;
+
+      _classCallCheck(this, Request);
+
+      _this4 = _super2.call(this);
+      installTimerFunctions(_assertThisInitialized(_this4), opts);
+      _this4.opts = opts;
+      _this4.method = opts.method || "GET";
+      _this4.uri = uri;
+      _this4.async = false !== opts.async;
+      _this4.data = undefined !== opts.data ? opts.data : null;
+
+      _this4.create();
+
+      return _this4;
+    }
+    /**
+     * Creates the XHR object and sends the request.
+     *
+     * @api private
+     */
+
+
+    _createClass(Request, [{
+      key: "create",
+      value: function create() {
+        var _this5 = this;
+
+        var opts = pick(this.opts, "agent", "pfx", "key", "passphrase", "cert", "ca", "ciphers", "rejectUnauthorized", "autoUnref");
+        opts.xdomain = !!this.opts.xd;
+        opts.xscheme = !!this.opts.xs;
+        var xhr = this.xhr = new XMLHttpRequest$1(opts);
+
+        try {
+          xhr.open(this.method, this.uri, this.async);
+
+          try {
+            if (this.opts.extraHeaders) {
+              xhr.setDisableHeaderCheck && xhr.setDisableHeaderCheck(true);
+
+              for (var i in this.opts.extraHeaders) {
+                if (this.opts.extraHeaders.hasOwnProperty(i)) {
+                  xhr.setRequestHeader(i, this.opts.extraHeaders[i]);
+                }
+              }
+            }
+          } catch (e) {}
+
+          if ("POST" === this.method) {
+            try {
+              xhr.setRequestHeader("Content-type", "text/plain;charset=UTF-8");
+            } catch (e) {}
+          }
+
+          try {
+            xhr.setRequestHeader("Accept", "*/*");
+          } catch (e) {} // ie6 check
+
+
+          if ("withCredentials" in xhr) {
+            xhr.withCredentials = this.opts.withCredentials;
+          }
+
+          if (this.opts.requestTimeout) {
+            xhr.timeout = this.opts.requestTimeout;
+          }
+
+          xhr.onreadystatechange = function () {
+            if (4 !== xhr.readyState) return;
+
+            if (200 === xhr.status || 1223 === xhr.status) {
+              _this5.onLoad();
+            } else {
+              // make sure the `error` event handler that's user-set
+              // does not throw in the same tick and gets caught here
+              _this5.setTimeoutFn(function () {
+                _this5.onError(typeof xhr.status === "number" ? xhr.status : 0);
+              }, 0);
+            }
+          };
+
+          xhr.send(this.data);
+        } catch (e) {
+          // Need to defer since .create() is called directly from the constructor
+          // and thus the 'error' event can only be only bound *after* this exception
+          // occurs.  Therefore, also, we cannot throw here at all.
+          this.setTimeoutFn(function () {
+            _this5.onError(e);
+          }, 0);
+          return;
+        }
+
+        if (typeof document !== "undefined") {
+          this.index = Request.requestsCount++;
+          Request.requests[this.index] = this;
+        }
+      }
+      /**
+       * Called upon successful response.
+       *
+       * @api private
+       */
+
+    }, {
+      key: "onSuccess",
+      value: function onSuccess() {
+        this.emit("success");
+        this.cleanup();
+      }
+      /**
+       * Called if we have data.
+       *
+       * @api private
+       */
+
+    }, {
+      key: "onData",
+      value: function onData(data) {
+        this.emit("data", data);
+        this.onSuccess();
+      }
+      /**
+       * Called upon error.
+       *
+       * @api private
+       */
+
+    }, {
+      key: "onError",
+      value: function onError(err) {
+        this.emit("error", err);
+        this.cleanup(true);
+      }
+      /**
+       * Cleans up house.
+       *
+       * @api private
+       */
+
+    }, {
+      key: "cleanup",
+      value: function cleanup(fromError) {
+        if ("undefined" === typeof this.xhr || null === this.xhr) {
+          return;
+        }
+
+        this.xhr.onreadystatechange = empty;
+
+        if (fromError) {
+          try {
+            this.xhr.abort();
+          } catch (e) {}
+        }
+
+        if (typeof document !== "undefined") {
+          delete Request.requests[this.index];
+        }
+
+        this.xhr = null;
+      }
+      /**
+       * Called upon load.
+       *
+       * @api private
+       */
+
+    }, {
+      key: "onLoad",
+      value: function onLoad() {
+        var data = this.xhr.responseText;
+
+        if (data !== null) {
+          this.onData(data);
+        }
+      }
+      /**
+       * Aborts the request.
+       *
+       * @api public
+       */
+
+    }, {
+      key: "abort",
+      value: function abort() {
+        this.cleanup();
+      }
+    }]);
+
+    return Request;
+  }(Emitter_1);
+  Request.requestsCount = 0;
+  Request.requests = {};
+  /**
+   * Aborts pending requests when unloading the window. This is needed to prevent
+   * memory leaks (e.g. when using IE) and to ensure that no spurious error is
+   * emitted.
+   */
+
+  if (typeof document !== "undefined") {
+    // @ts-ignore
+    if (typeof attachEvent === "function") {
+      // @ts-ignore
+      attachEvent("onunload", unloadHandler);
+    } else if (typeof addEventListener === "function") {
+      var terminationEvent = "onpagehide" in globalThis ? "pagehide" : "unload";
+      addEventListener(terminationEvent, unloadHandler, false);
+    }
+  }
+
+  function unloadHandler() {
+    for (var i in Request.requests) {
+      if (Request.requests.hasOwnProperty(i)) {
+        Request.requests[i].abort();
+      }
+    }
+  }
+
+  var nextTick = function () {
+    var isPromiseAvailable = typeof Promise === "function" && typeof Promise.resolve === "function";
+
+    if (isPromiseAvailable) {
+      return function (cb) {
+        return Promise.resolve().then(cb);
+      };
+    } else {
+      return function (cb, setTimeoutFn) {
+        return setTimeoutFn(cb, 0);
+      };
+    }
+  }();
+  var WebSocket = globalThis.WebSocket || globalThis.MozWebSocket;
+  var usingBrowserWebSocket = true;
+  var defaultBinaryType = "arraybuffer";
+
+  var isReactNative = typeof navigator !== "undefined" && typeof navigator.product === "string" && navigator.product.toLowerCase() === "reactnative";
+  var WS = /*#__PURE__*/function (_Transport) {
+    _inherits(WS, _Transport);
+
+    var _super = _createSuper(WS);
+
+    /**
+     * WebSocket transport constructor.
+     *
+     * @api {Object} connection options
+     * @api public
+     */
+    function WS(opts) {
+      var _this;
+
+      _classCallCheck(this, WS);
+
+      _this = _super.call(this, opts);
+      _this.supportsBinary = !opts.forceBase64;
+      return _this;
+    }
+    /**
+     * Transport name.
+     *
+     * @api public
+     */
+
+
+    _createClass(WS, [{
+      key: "name",
+      get: function get() {
+        return "websocket";
+      }
+      /**
+       * Opens socket.
+       *
+       * @api private
+       */
+
+    }, {
+      key: "doOpen",
+      value: function doOpen() {
+        if (!this.check()) {
+          // let probe timeout
+          return;
+        }
+
+        var uri = this.uri();
+        var protocols = this.opts.protocols; // React Native only supports the 'headers' option, and will print a warning if anything else is passed
+
+        var opts = isReactNative ? {} : pick(this.opts, "agent", "perMessageDeflate", "pfx", "key", "passphrase", "cert", "ca", "ciphers", "rejectUnauthorized", "localAddress", "protocolVersion", "origin", "maxPayload", "family", "checkServerIdentity");
+
+        if (this.opts.extraHeaders) {
+          opts.headers = this.opts.extraHeaders;
+        }
+
+        try {
+          this.ws = usingBrowserWebSocket && !isReactNative ? protocols ? new WebSocket(uri, protocols) : new WebSocket(uri) : new WebSocket(uri, protocols, opts);
+        } catch (err) {
+          return this.emit("error", err);
+        }
+
+        this.ws.binaryType = this.socket.binaryType || defaultBinaryType;
+        this.addEventListeners();
+      }
+      /**
+       * Adds event listeners to the socket
+       *
+       * @api private
+       */
+
+    }, {
+      key: "addEventListeners",
+      value: function addEventListeners() {
+        var _this2 = this;
+
+        this.ws.onopen = function () {
+          if (_this2.opts.autoUnref) {
+            _this2.ws._socket.unref();
+          }
+
+          _this2.onOpen();
+        };
+
+        this.ws.onclose = this.onClose.bind(this);
+
+        this.ws.onmessage = function (ev) {
+          return _this2.onData(ev.data);
+        };
+
+        this.ws.onerror = function (e) {
+          return _this2.onError("websocket error", e);
+        };
+      }
+      /**
+       * Writes data to socket.
+       *
+       * @param {Array} array of packets.
+       * @api private
+       */
+
+    }, {
+      key: "write",
+      value: function write(packets) {
+        var _this3 = this;
+
+        this.writable = false; // encodePacket efficient as it uses WS framing
+        // no need for encodePayload
+
+        var _loop = function _loop(i) {
+          var packet = packets[i];
+          var lastPacket = i === packets.length - 1;
+          encodePacket(packet, _this3.supportsBinary, function (data) {
+            // always create a new object (GH-437)
+            var opts = {};
+            // have a chance of informing us about it yet, in that case send will
+            // throw an error
+
+
+            try {
+              if (usingBrowserWebSocket) {
+                // TypeError is thrown when passing the second argument on Safari
+                _this3.ws.send(data);
+              }
+            } catch (e) {}
+
+            if (lastPacket) {
+              // fake drain
+              // defer to next tick to allow Socket to clear writeBuffer
+              nextTick(function () {
+                _this3.writable = true;
+
+                _this3.emit("drain");
+              }, _this3.setTimeoutFn);
+            }
+          });
+        };
+
+        for (var i = 0; i < packets.length; i++) {
+          _loop(i);
+        }
+      }
+      /**
+       * Closes socket.
+       *
+       * @api private
+       */
+
+    }, {
+      key: "doClose",
+      value: function doClose() {
+        if (typeof this.ws !== "undefined") {
+          this.ws.close();
+          this.ws = null;
+        }
+      }
+      /**
+       * Generates uri for connection.
+       *
+       * @api private
+       */
+
+    }, {
+      key: "uri",
+      value: function uri() {
+        var query = this.query || {};
+        var schema = this.opts.secure ? "wss" : "ws";
+        var port = ""; // avoid port if default for schema
+
+        if (this.opts.port && ("wss" === schema && Number(this.opts.port) !== 443 || "ws" === schema && Number(this.opts.port) !== 80)) {
+          port = ":" + this.opts.port;
+        } // append timestamp to URI
+
+
+        if (this.opts.timestampRequests) {
+          query[this.opts.timestampParam] = yeast_1();
+        } // communicate binary support capabilities
+
+
+        if (!this.supportsBinary) {
+          query.b64 = 1;
+        }
+
+        var encodedQuery = parseqs.encode(query);
+        var ipv6 = this.opts.hostname.indexOf(":") !== -1;
+        return schema + "://" + (ipv6 ? "[" + this.opts.hostname + "]" : this.opts.hostname) + port + this.opts.path + (encodedQuery.length ? "?" + encodedQuery : "");
+      }
+      /**
+       * Feature detection for WebSocket.
+       *
+       * @return {Boolean} whether this transport is available.
+       * @api public
+       */
+
+    }, {
+      key: "check",
+      value: function check() {
+        return !!WebSocket && !("__initialize" in WebSocket && this.name === WS.prototype.name);
+      }
+    }]);
+
+    return WS;
+  }(Transport);
+
+  var transports = {
+    websocket: WS,
+    polling: XHR
+  };
+
+  var Socket$1 = /*#__PURE__*/function (_Emitter) {
+    _inherits(Socket, _Emitter);
+
+    var _super = _createSuper(Socket);
+
+    /**
+     * Socket constructor.
+     *
+     * @param {String|Object} uri or options
+     * @param {Object} opts - options
+     * @api public
+     */
+    function Socket(uri) {
+      var _this;
+
+      var opts = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
+
+      _classCallCheck(this, Socket);
+
+      _this = _super.call(this);
+
+      if (uri && "object" === _typeof(uri)) {
+        opts = uri;
+        uri = null;
+      }
+
+      if (uri) {
+        uri = parseuri(uri);
+        opts.hostname = uri.host;
+        opts.secure = uri.protocol === "https" || uri.protocol === "wss";
+        opts.port = uri.port;
+        if (uri.query) opts.query = uri.query;
+      } else if (opts.host) {
+        opts.hostname = parseuri(opts.host).host;
+      }
+
+      installTimerFunctions(_assertThisInitialized(_this), opts);
+      _this.secure = null != opts.secure ? opts.secure : typeof location !== "undefined" && "https:" === location.protocol;
+
+      if (opts.hostname && !opts.port) {
+        // if no port is specified manually, use the protocol default
+        opts.port = _this.secure ? "443" : "80";
+      }
+
+      _this.hostname = opts.hostname || (typeof location !== "undefined" ? location.hostname : "localhost");
+      _this.port = opts.port || (typeof location !== "undefined" && location.port ? location.port : _this.secure ? "443" : "80");
+      _this.transports = opts.transports || ["polling", "websocket"];
+      _this.readyState = "";
+      _this.writeBuffer = [];
+      _this.prevBufferLen = 0;
+      _this.opts = _extends({
+        path: "/engine.io",
+        agent: false,
+        withCredentials: false,
+        upgrade: true,
+        timestampParam: "t",
+        rememberUpgrade: false,
+        rejectUnauthorized: true,
+        perMessageDeflate: {
+          threshold: 1024
+        },
+        transportOptions: {},
+        closeOnBeforeunload: true
+      }, opts);
+      _this.opts.path = _this.opts.path.replace(/\/$/, "") + "/";
+
+      if (typeof _this.opts.query === "string") {
+        _this.opts.query = parseqs.decode(_this.opts.query);
+      } // set on handshake
+
+
+      _this.id = null;
+      _this.upgrades = null;
+      _this.pingInterval = null;
+      _this.pingTimeout = null; // set on heartbeat
+
+      _this.pingTimeoutTimer = null;
+
+      if (typeof addEventListener === "function") {
+        if (_this.opts.closeOnBeforeunload) {
+          // Firefox closes the connection when the "beforeunload" event is emitted but not Chrome. This event listener
+          // ensures every browser behaves the same (no "disconnect" event at the Socket.IO level when the page is
+          // closed/reloaded)
+          addEventListener("beforeunload", function () {
+            if (_this.transport) {
+              // silently close the transport
+              _this.transport.removeAllListeners();
+
+              _this.transport.close();
+            }
+          }, false);
+        }
+
+        if (_this.hostname !== "localhost") {
+          _this.offlineEventListener = function () {
+            _this.onClose("transport close");
+          };
+
+          addEventListener("offline", _this.offlineEventListener, false);
+        }
+      }
+
+      _this.open();
+
+      return _this;
+    }
+    /**
+     * Creates transport of the given type.
+     *
+     * @param {String} transport name
+     * @return {Transport}
+     * @api private
+     */
+
+
+    _createClass(Socket, [{
+      key: "createTransport",
+      value: function createTransport(name) {
+        var query = clone(this.opts.query); // append engine.io protocol identifier
+
+        query.EIO = protocol$1; // transport name
+
+        query.transport = name; // session id if we already have one
+
+        if (this.id) query.sid = this.id;
+
+        var opts = _extends({}, this.opts.transportOptions[name], this.opts, {
+          query: query,
+          socket: this,
+          hostname: this.hostname,
+          secure: this.secure,
+          port: this.port
+        });
+
+        return new transports[name](opts);
+      }
+      /**
+       * Initializes transport to use and starts probe.
+       *
+       * @api private
+       */
+
+    }, {
+      key: "open",
+      value: function open() {
+        var _this2 = this;
+
+        var transport;
+
+        if (this.opts.rememberUpgrade && Socket.priorWebsocketSuccess && this.transports.indexOf("websocket") !== -1) {
+          transport = "websocket";
+        } else if (0 === this.transports.length) {
+          // Emit error on next tick so it can be listened to
+          this.setTimeoutFn(function () {
+            _this2.emitReserved("error", "No transports available");
+          }, 0);
+          return;
+        } else {
+          transport = this.transports[0];
+        }
+
+        this.readyState = "opening"; // Retry with the next transport if the transport is disabled (jsonp: false)
+
+        try {
+          transport = this.createTransport(transport);
+        } catch (e) {
+          this.transports.shift();
+          this.open();
+          return;
+        }
+
+        transport.open();
+        this.setTransport(transport);
+      }
+      /**
+       * Sets the current transport. Disables the existing one (if any).
+       *
+       * @api private
+       */
+
+    }, {
+      key: "setTransport",
+      value: function setTransport(transport) {
+        var _this3 = this;
+
+        if (this.transport) {
+          this.transport.removeAllListeners();
+        } // set up transport
+
+
+        this.transport = transport; // set up transport listeners
+
+        transport.on("drain", this.onDrain.bind(this)).on("packet", this.onPacket.bind(this)).on("error", this.onError.bind(this)).on("close", function () {
+          _this3.onClose("transport close");
+        });
+      }
+      /**
+       * Probes a transport.
+       *
+       * @param {String} transport name
+       * @api private
+       */
+
+    }, {
+      key: "probe",
+      value: function probe(name) {
+        var _this4 = this;
+
+        var transport = this.createTransport(name);
+        var failed = false;
+        Socket.priorWebsocketSuccess = false;
+
+        var onTransportOpen = function onTransportOpen() {
+          if (failed) return;
+          transport.send([{
+            type: "ping",
+            data: "probe"
+          }]);
+          transport.once("packet", function (msg) {
+            if (failed) return;
+
+            if ("pong" === msg.type && "probe" === msg.data) {
+              _this4.upgrading = true;
+
+              _this4.emitReserved("upgrading", transport);
+
+              if (!transport) return;
+              Socket.priorWebsocketSuccess = "websocket" === transport.name;
+
+              _this4.transport.pause(function () {
+                if (failed) return;
+                if ("closed" === _this4.readyState) return;
+                cleanup();
+
+                _this4.setTransport(transport);
+
+                transport.send([{
+                  type: "upgrade"
+                }]);
+
+                _this4.emitReserved("upgrade", transport);
+
+                transport = null;
+                _this4.upgrading = false;
+
+                _this4.flush();
+              });
+            } else {
+              var err = new Error("probe error"); // @ts-ignore
+
+              err.transport = transport.name;
+
+              _this4.emitReserved("upgradeError", err);
+            }
+          });
+        };
+
+        function freezeTransport() {
+          if (failed) return; // Any callback called by transport should be ignored since now
+
+          failed = true;
+          cleanup();
+          transport.close();
+          transport = null;
+        } // Handle any error that happens while probing
+
+
+        var onerror = function onerror(err) {
+          var error = new Error("probe error: " + err); // @ts-ignore
+
+          error.transport = transport.name;
+          freezeTransport();
+
+          _this4.emitReserved("upgradeError", error);
+        };
+
+        function onTransportClose() {
+          onerror("transport closed");
+        } // When the socket is closed while we're probing
+
+
+        function onclose() {
+          onerror("socket closed");
+        } // When the socket is upgraded while we're probing
+
+
+        function onupgrade(to) {
+          if (transport && to.name !== transport.name) {
+            freezeTransport();
+          }
+        } // Remove all listeners on the transport and on self
+
+
+        var cleanup = function cleanup() {
+          transport.removeListener("open", onTransportOpen);
+          transport.removeListener("error", onerror);
+          transport.removeListener("close", onTransportClose);
+
+          _this4.off("close", onclose);
+
+          _this4.off("upgrading", onupgrade);
+        };
+
+        transport.once("open", onTransportOpen);
+        transport.once("error", onerror);
+        transport.once("close", onTransportClose);
+        this.once("close", onclose);
+        this.once("upgrading", onupgrade);
+        transport.open();
+      }
+      /**
+       * Called when connection is deemed open.
+       *
+       * @api private
+       */
+
+    }, {
+      key: "onOpen",
+      value: function onOpen() {
+        this.readyState = "open";
+        Socket.priorWebsocketSuccess = "websocket" === this.transport.name;
+        this.emitReserved("open");
+        this.flush(); // we check for `readyState` in case an `open`
+        // listener already closed the socket
+
+        if ("open" === this.readyState && this.opts.upgrade && this.transport.pause) {
+          var i = 0;
+          var l = this.upgrades.length;
+
+          for (; i < l; i++) {
+            this.probe(this.upgrades[i]);
+          }
+        }
+      }
+      /**
+       * Handles a packet.
+       *
+       * @api private
+       */
+
+    }, {
+      key: "onPacket",
+      value: function onPacket(packet) {
+        if ("opening" === this.readyState || "open" === this.readyState || "closing" === this.readyState) {
+          this.emitReserved("packet", packet); // Socket is live - any packet counts
+
+          this.emitReserved("heartbeat");
+
+          switch (packet.type) {
+            case "open":
+              this.onHandshake(JSON.parse(packet.data));
+              break;
+
+            case "ping":
+              this.resetPingTimeout();
+              this.sendPacket("pong");
+              this.emitReserved("ping");
+              this.emitReserved("pong");
+              break;
+
+            case "error":
+              var err = new Error("server error"); // @ts-ignore
+
+              err.code = packet.data;
+              this.onError(err);
+              break;
+
+            case "message":
+              this.emitReserved("data", packet.data);
+              this.emitReserved("message", packet.data);
+              break;
+          }
+        }
+      }
+      /**
+       * Called upon handshake completion.
+       *
+       * @param {Object} data - handshake obj
+       * @api private
+       */
+
+    }, {
+      key: "onHandshake",
+      value: function onHandshake(data) {
+        this.emitReserved("handshake", data);
+        this.id = data.sid;
+        this.transport.query.sid = data.sid;
+        this.upgrades = this.filterUpgrades(data.upgrades);
+        this.pingInterval = data.pingInterval;
+        this.pingTimeout = data.pingTimeout;
+        this.onOpen(); // In case open handler closes socket
+
+        if ("closed" === this.readyState) return;
+        this.resetPingTimeout();
+      }
+      /**
+       * Sets and resets ping timeout timer based on server pings.
+       *
+       * @api private
+       */
+
+    }, {
+      key: "resetPingTimeout",
+      value: function resetPingTimeout() {
+        var _this5 = this;
+
+        this.clearTimeoutFn(this.pingTimeoutTimer);
+        this.pingTimeoutTimer = this.setTimeoutFn(function () {
+          _this5.onClose("ping timeout");
+        }, this.pingInterval + this.pingTimeout);
+
+        if (this.opts.autoUnref) {
+          this.pingTimeoutTimer.unref();
+        }
+      }
+      /**
+       * Called on `drain` event
+       *
+       * @api private
+       */
+
+    }, {
+      key: "onDrain",
+      value: function onDrain() {
+        this.writeBuffer.splice(0, this.prevBufferLen); // setting prevBufferLen = 0 is very important
+        // for example, when upgrading, upgrade packet is sent over,
+        // and a nonzero prevBufferLen could cause problems on `drain`
+
+        this.prevBufferLen = 0;
+
+        if (0 === this.writeBuffer.length) {
+          this.emitReserved("drain");
+        } else {
+          this.flush();
+        }
+      }
+      /**
+       * Flush write buffers.
+       *
+       * @api private
+       */
+
+    }, {
+      key: "flush",
+      value: function flush() {
+        if ("closed" !== this.readyState && this.transport.writable && !this.upgrading && this.writeBuffer.length) {
+          this.transport.send(this.writeBuffer); // keep track of current length of writeBuffer
+          // splice writeBuffer and callbackBuffer on `drain`
+
+          this.prevBufferLen = this.writeBuffer.length;
+          this.emitReserved("flush");
+        }
+      }
+      /**
+       * Sends a message.
+       *
+       * @param {String} message.
+       * @param {Function} callback function.
+       * @param {Object} options.
+       * @return {Socket} for chaining.
+       * @api public
+       */
+
+    }, {
+      key: "write",
+      value: function write(msg, options, fn) {
+        this.sendPacket("message", msg, options, fn);
+        return this;
+      }
+    }, {
+      key: "send",
+      value: function send(msg, options, fn) {
+        this.sendPacket("message", msg, options, fn);
+        return this;
+      }
+      /**
+       * Sends a packet.
+       *
+       * @param {String} packet type.
+       * @param {String} data.
+       * @param {Object} options.
+       * @param {Function} callback function.
+       * @api private
+       */
+
+    }, {
+      key: "sendPacket",
+      value: function sendPacket(type, data, options, fn) {
+        if ("function" === typeof data) {
+          fn = data;
+          data = undefined;
+        }
+
+        if ("function" === typeof options) {
+          fn = options;
+          options = null;
+        }
+
+        if ("closing" === this.readyState || "closed" === this.readyState) {
+          return;
+        }
+
+        options = options || {};
+        options.compress = false !== options.compress;
+        var packet = {
+          type: type,
+          data: data,
+          options: options
+        };
+        this.emitReserved("packetCreate", packet);
+        this.writeBuffer.push(packet);
+        if (fn) this.once("flush", fn);
+        this.flush();
+      }
+      /**
+       * Closes the connection.
+       *
+       * @api public
+       */
+
+    }, {
+      key: "close",
+      value: function close() {
+        var _this6 = this;
+
+        var close = function close() {
+          _this6.onClose("forced close");
+
+          _this6.transport.close();
+        };
+
+        var cleanupAndClose = function cleanupAndClose() {
+          _this6.off("upgrade", cleanupAndClose);
+
+          _this6.off("upgradeError", cleanupAndClose);
+
+          close();
+        };
+
+        var waitForUpgrade = function waitForUpgrade() {
+          // wait for upgrade to finish since we can't send packets while pausing a transport
+          _this6.once("upgrade", cleanupAndClose);
+
+          _this6.once("upgradeError", cleanupAndClose);
+        };
+
+        if ("opening" === this.readyState || "open" === this.readyState) {
+          this.readyState = "closing";
+
+          if (this.writeBuffer.length) {
+            this.once("drain", function () {
+              if (_this6.upgrading) {
+                waitForUpgrade();
+              } else {
+                close();
+              }
+            });
+          } else if (this.upgrading) {
+            waitForUpgrade();
+          } else {
+            close();
+          }
+        }
+
+        return this;
+      }
+      /**
+       * Called upon transport error
+       *
+       * @api private
+       */
+
+    }, {
+      key: "onError",
+      value: function onError(err) {
+        Socket.priorWebsocketSuccess = false;
+        this.emitReserved("error", err);
+        this.onClose("transport error", err);
+      }
+      /**
+       * Called upon transport close.
+       *
+       * @api private
+       */
+
+    }, {
+      key: "onClose",
+      value: function onClose(reason, desc) {
+        if ("opening" === this.readyState || "open" === this.readyState || "closing" === this.readyState) {
+          // clear timers
+          this.clearTimeoutFn(this.pingTimeoutTimer); // stop event from firing again for transport
+
+          this.transport.removeAllListeners("close"); // ensure transport won't stay open
+
+          this.transport.close(); // ignore further transport communication
+
+          this.transport.removeAllListeners();
+
+          if (typeof removeEventListener === "function") {
+            removeEventListener("offline", this.offlineEventListener, false);
+          } // set ready state
+
+
+          this.readyState = "closed"; // clear session id
+
+          this.id = null; // emit close event
+
+          this.emitReserved("close", reason, desc); // clean buffers after, so users can still
+          // grab the buffers on `close` event
+
+          this.writeBuffer = [];
+          this.prevBufferLen = 0;
+        }
+      }
+      /**
+       * Filters upgrades, returning only those matching client transports.
+       *
+       * @param {Array} server upgrades
+       * @api private
+       *
+       */
+
+    }, {
+      key: "filterUpgrades",
+      value: function filterUpgrades(upgrades) {
+        var filteredUpgrades = [];
+        var i = 0;
+        var j = upgrades.length;
+
+        for (; i < j; i++) {
+          if (~this.transports.indexOf(upgrades[i])) filteredUpgrades.push(upgrades[i]);
+        }
+
+        return filteredUpgrades;
+      }
+    }]);
+
+    return Socket;
+  }(Emitter_1);
+  Socket$1.protocol = protocol$1;
+
+  function clone(obj) {
+    var o = {};
+
+    for (var i in obj) {
+      if (obj.hasOwnProperty(i)) {
+        o[i] = obj[i];
+      }
+    }
+
+    return o;
+  }
+
+  var withNativeArrayBuffer = typeof ArrayBuffer === "function";
+
+  var isView = function isView(obj) {
+    return typeof ArrayBuffer.isView === "function" ? ArrayBuffer.isView(obj) : obj.buffer instanceof ArrayBuffer;
+  };
+
+  var toString = Object.prototype.toString;
+  var withNativeBlob = typeof Blob === "function" || typeof Blob !== "undefined" && toString.call(Blob) === "[object BlobConstructor]";
+  var withNativeFile = typeof File === "function" || typeof File !== "undefined" && toString.call(File) === "[object FileConstructor]";
+  /**
+   * Returns true if obj is a Buffer, an ArrayBuffer, a Blob or a File.
+   *
+   * @private
+   */
+
+  function isBinary(obj) {
+    return withNativeArrayBuffer && (obj instanceof ArrayBuffer || isView(obj)) || withNativeBlob && obj instanceof Blob || withNativeFile && obj instanceof File;
+  }
+  function hasBinary(obj, toJSON) {
+    if (!obj || _typeof(obj) !== "object") {
+      return false;
+    }
+
+    if (Array.isArray(obj)) {
+      for (var i = 0, l = obj.length; i < l; i++) {
+        if (hasBinary(obj[i])) {
+          return true;
+        }
+      }
+
+      return false;
+    }
+
+    if (isBinary(obj)) {
+      return true;
+    }
+
+    if (obj.toJSON && typeof obj.toJSON === "function" && arguments.length === 1) {
+      return hasBinary(obj.toJSON(), true);
+    }
+
+    for (var key in obj) {
+      if (Object.prototype.hasOwnProperty.call(obj, key) && hasBinary(obj[key])) {
+        return true;
+      }
+    }
+
+    return false;
+  }
+
+  /**
+   * Replaces every Buffer | ArrayBuffer | Blob | File in packet with a numbered placeholder.
+   *
+   * @param {Object} packet - socket.io event packet
+   * @return {Object} with deconstructed packet and list of buffers
+   * @public
+   */
+
+  function deconstructPacket(packet) {
+    var buffers = [];
+    var packetData = packet.data;
+    var pack = packet;
+    pack.data = _deconstructPacket(packetData, buffers);
+    pack.attachments = buffers.length; // number of binary 'attachments'
+
+    return {
+      packet: pack,
+      buffers: buffers
+    };
+  }
+
+  function _deconstructPacket(data, buffers) {
+    if (!data) return data;
+
+    if (isBinary(data)) {
+      var placeholder = {
+        _placeholder: true,
+        num: buffers.length
+      };
+      buffers.push(data);
+      return placeholder;
+    } else if (Array.isArray(data)) {
+      var newData = new Array(data.length);
+
+      for (var i = 0; i < data.length; i++) {
+        newData[i] = _deconstructPacket(data[i], buffers);
+      }
+
+      return newData;
+    } else if (_typeof(data) === "object" && !(data instanceof Date)) {
+      var _newData = {};
+
+      for (var key in data) {
+        if (data.hasOwnProperty(key)) {
+          _newData[key] = _deconstructPacket(data[key], buffers);
+        }
+      }
+
+      return _newData;
+    }
+
+    return data;
+  }
+  /**
+   * Reconstructs a binary packet from its placeholder packet and buffers
+   *
+   * @param {Object} packet - event packet with placeholders
+   * @param {Array} buffers - binary buffers to put in placeholder positions
+   * @return {Object} reconstructed packet
+   * @public
+   */
+
+
+  function reconstructPacket(packet, buffers) {
+    packet.data = _reconstructPacket(packet.data, buffers);
+    packet.attachments = undefined; // no longer useful
+
+    return packet;
+  }
+
+  function _reconstructPacket(data, buffers) {
+    if (!data) return data;
+
+    if (data && data._placeholder) {
+      return buffers[data.num]; // appropriate buffer (should be natural order anyway)
+    } else if (Array.isArray(data)) {
+      for (var i = 0; i < data.length; i++) {
+        data[i] = _reconstructPacket(data[i], buffers);
+      }
+    } else if (_typeof(data) === "object") {
+      for (var key in data) {
+        if (data.hasOwnProperty(key)) {
+          data[key] = _reconstructPacket(data[key], buffers);
+        }
+      }
+    }
+
+    return data;
+  }
+
+  /**
+   * Protocol version.
+   *
+   * @public
+   */
+
+  var protocol = 5;
+  var PacketType;
+
+  (function (PacketType) {
+    PacketType[PacketType["CONNECT"] = 0] = "CONNECT";
+    PacketType[PacketType["DISCONNECT"] = 1] = "DISCONNECT";
+    PacketType[PacketType["EVENT"] = 2] = "EVENT";
+    PacketType[PacketType["ACK"] = 3] = "ACK";
+    PacketType[PacketType["CONNECT_ERROR"] = 4] = "CONNECT_ERROR";
+    PacketType[PacketType["BINARY_EVENT"] = 5] = "BINARY_EVENT";
+    PacketType[PacketType["BINARY_ACK"] = 6] = "BINARY_ACK";
+  })(PacketType || (PacketType = {}));
+  /**
+   * A socket.io Encoder instance
+   */
+
+
+  var Encoder = /*#__PURE__*/function () {
+    function Encoder() {
+      _classCallCheck(this, Encoder);
+    }
+
+    _createClass(Encoder, [{
+      key: "encode",
+      value:
+      /**
+       * Encode a packet as a single string if non-binary, or as a
+       * buffer sequence, depending on packet type.
+       *
+       * @param {Object} obj - packet object
+       */
+      function encode(obj) {
+        if (obj.type === PacketType.EVENT || obj.type === PacketType.ACK) {
+          if (hasBinary(obj)) {
+            obj.type = obj.type === PacketType.EVENT ? PacketType.BINARY_EVENT : PacketType.BINARY_ACK;
+            return this.encodeAsBinary(obj);
+          }
+        }
+
+        return [this.encodeAsString(obj)];
+      }
+      /**
+       * Encode packet as string.
+       */
+
+    }, {
+      key: "encodeAsString",
+      value: function encodeAsString(obj) {
+        // first is type
+        var str = "" + obj.type; // attachments if we have them
+
+        if (obj.type === PacketType.BINARY_EVENT || obj.type === PacketType.BINARY_ACK) {
+          str += obj.attachments + "-";
+        } // if we have a namespace other than `/`
+        // we append it followed by a comma `,`
+
+
+        if (obj.nsp && "/" !== obj.nsp) {
+          str += obj.nsp + ",";
+        } // immediately followed by the id
+
+
+        if (null != obj.id) {
+          str += obj.id;
+        } // json data
+
+
+        if (null != obj.data) {
+          str += JSON.stringify(obj.data);
+        }
+
+        return str;
+      }
+      /**
+       * Encode packet as 'buffer sequence' by removing blobs, and
+       * deconstructing packet into object with placeholders and
+       * a list of buffers.
+       */
+
+    }, {
+      key: "encodeAsBinary",
+      value: function encodeAsBinary(obj) {
+        var deconstruction = deconstructPacket(obj);
+        var pack = this.encodeAsString(deconstruction.packet);
+        var buffers = deconstruction.buffers;
+        buffers.unshift(pack); // add packet info to beginning of data list
+
+        return buffers; // write all the buffers
+      }
+    }]);
+
+    return Encoder;
+  }();
+  /**
+   * A socket.io Decoder instance
+   *
+   * @return {Object} decoder
+   */
+
+  var Decoder = /*#__PURE__*/function (_Emitter) {
+    _inherits(Decoder, _Emitter);
+
+    var _super = _createSuper(Decoder);
+
+    function Decoder() {
+      _classCallCheck(this, Decoder);
+
+      return _super.call(this);
+    }
+    /**
+     * Decodes an encoded packet string into packet JSON.
+     *
+     * @param {String} obj - encoded packet
+     */
+
+
+    _createClass(Decoder, [{
+      key: "add",
+      value: function add(obj) {
+        var packet;
+
+        if (typeof obj === "string") {
+          packet = this.decodeString(obj);
+
+          if (packet.type === PacketType.BINARY_EVENT || packet.type === PacketType.BINARY_ACK) {
+            // binary packet's json
+            this.reconstructor = new BinaryReconstructor(packet); // no attachments, labeled binary but no binary data to follow
+
+            if (packet.attachments === 0) {
+              _get(_getPrototypeOf(Decoder.prototype), "emitReserved", this).call(this, "decoded", packet);
+            }
+          } else {
+            // non-binary full packet
+            _get(_getPrototypeOf(Decoder.prototype), "emitReserved", this).call(this, "decoded", packet);
+          }
+        } else if (isBinary(obj) || obj.base64) {
+          // raw binary data
+          if (!this.reconstructor) {
+            throw new Error("got binary data when not reconstructing a packet");
+          } else {
+            packet = this.reconstructor.takeBinaryData(obj);
+
+            if (packet) {
+              // received final buffer
+              this.reconstructor = null;
+
+              _get(_getPrototypeOf(Decoder.prototype), "emitReserved", this).call(this, "decoded", packet);
+            }
+          }
+        } else {
+          throw new Error("Unknown type: " + obj);
+        }
+      }
+      /**
+       * Decode a packet String (JSON data)
+       *
+       * @param {String} str
+       * @return {Object} packet
+       */
+
+    }, {
+      key: "decodeString",
+      value: function decodeString(str) {
+        var i = 0; // look up type
+
+        var p = {
+          type: Number(str.charAt(0))
+        };
+
+        if (PacketType[p.type] === undefined) {
+          throw new Error("unknown packet type " + p.type);
+        } // look up attachments if type binary
+
+
+        if (p.type === PacketType.BINARY_EVENT || p.type === PacketType.BINARY_ACK) {
+          var start = i + 1;
+
+          while (str.charAt(++i) !== "-" && i != str.length) {}
+
+          var buf = str.substring(start, i);
+
+          if (buf != Number(buf) || str.charAt(i) !== "-") {
+            throw new Error("Illegal attachments");
+          }
+
+          p.attachments = Number(buf);
+        } // look up namespace (if any)
+
+
+        if ("/" === str.charAt(i + 1)) {
+          var _start = i + 1;
+
+          while (++i) {
+            var c = str.charAt(i);
+            if ("," === c) break;
+            if (i === str.length) break;
+          }
+
+          p.nsp = str.substring(_start, i);
+        } else {
+          p.nsp = "/";
+        } // look up id
+
+
+        var next = str.charAt(i + 1);
+
+        if ("" !== next && Number(next) == next) {
+          var _start2 = i + 1;
+
+          while (++i) {
+            var _c = str.charAt(i);
+
+            if (null == _c || Number(_c) != _c) {
+              --i;
+              break;
+            }
+
+            if (i === str.length) break;
+          }
+
+          p.id = Number(str.substring(_start2, i + 1));
+        } // look up json data
+
+
+        if (str.charAt(++i)) {
+          var payload = tryParse(str.substr(i));
+
+          if (Decoder.isPayloadValid(p.type, payload)) {
+            p.data = payload;
+          } else {
+            throw new Error("invalid payload");
+          }
+        }
+
+        return p;
+      }
+    }, {
+      key: "destroy",
+      value:
+      /**
+       * Deallocates a parser's resources
+       */
+      function destroy() {
+        if (this.reconstructor) {
+          this.reconstructor.finishedReconstruction();
+        }
+      }
+    }], [{
+      key: "isPayloadValid",
+      value: function isPayloadValid(type, payload) {
+        switch (type) {
+          case PacketType.CONNECT:
+            return _typeof(payload) === "object";
+
+          case PacketType.DISCONNECT:
+            return payload === undefined;
+
+          case PacketType.CONNECT_ERROR:
+            return typeof payload === "string" || _typeof(payload) === "object";
+
+          case PacketType.EVENT:
+          case PacketType.BINARY_EVENT:
+            return Array.isArray(payload) && payload.length > 0;
+
+          case PacketType.ACK:
+          case PacketType.BINARY_ACK:
+            return Array.isArray(payload);
+        }
+      }
+    }]);
+
+    return Decoder;
+  }(Emitter_1);
+
+  function tryParse(str) {
+    try {
+      return JSON.parse(str);
+    } catch (e) {
+      return false;
+    }
+  }
+  /**
+   * A manager of a binary event's 'buffer sequence'. Should
+   * be constructed whenever a packet of type BINARY_EVENT is
+   * decoded.
+   *
+   * @param {Object} packet
+   * @return {BinaryReconstructor} initialized reconstructor
+   */
+
+
+  var BinaryReconstructor = /*#__PURE__*/function () {
+    function BinaryReconstructor(packet) {
+      _classCallCheck(this, BinaryReconstructor);
+
+      this.packet = packet;
+      this.buffers = [];
+      this.reconPack = packet;
+    }
+    /**
+     * Method to be called when binary data received from connection
+     * after a BINARY_EVENT packet.
+     *
+     * @param {Buffer | ArrayBuffer} binData - the raw binary data received
+     * @return {null | Object} returns null if more binary data is expected or
+     *   a reconstructed packet object if all buffers have been received.
+     */
+
+
+    _createClass(BinaryReconstructor, [{
+      key: "takeBinaryData",
+      value: function takeBinaryData(binData) {
+        this.buffers.push(binData);
+
+        if (this.buffers.length === this.reconPack.attachments) {
+          // done with buffer list
+          var packet = reconstructPacket(this.reconPack, this.buffers);
+          this.finishedReconstruction();
+          return packet;
+        }
+
+        return null;
+      }
+      /**
+       * Cleans up binary packet reconstruction variables.
+       */
+
+    }, {
+      key: "finishedReconstruction",
+      value: function finishedReconstruction() {
+        this.reconPack = null;
+        this.buffers = [];
+      }
+    }]);
+
+    return BinaryReconstructor;
+  }();
+
+  var parser = /*#__PURE__*/Object.freeze({
+    __proto__: null,
+    protocol: protocol,
+    get PacketType () { return PacketType; },
+    Encoder: Encoder,
+    Decoder: Decoder
+  });
+
+  function on(obj, ev, fn) {
+    obj.on(ev, fn);
+    return function subDestroy() {
+      obj.off(ev, fn);
+    };
+  }
+
+  /**
+   * Internal events.
+   * These events can't be emitted by the user.
+   */
+
+  var RESERVED_EVENTS = Object.freeze({
+    connect: 1,
+    connect_error: 1,
+    disconnect: 1,
+    disconnecting: 1,
+    // EventEmitter reserved events: https://nodejs.org/api/events.html#events_event_newlistener
+    newListener: 1,
+    removeListener: 1
+  });
+  var Socket = /*#__PURE__*/function (_Emitter) {
+    _inherits(Socket, _Emitter);
+
+    var _super = _createSuper(Socket);
+
+    /**
+     * `Socket` constructor.
+     *
+     * @public
+     */
+    function Socket(io, nsp, opts) {
+      var _this;
+
+      _classCallCheck(this, Socket);
+
+      _this = _super.call(this);
+      _this.connected = false;
+      _this.disconnected = true;
+      _this.receiveBuffer = [];
+      _this.sendBuffer = [];
+      _this.ids = 0;
+      _this.acks = {};
+      _this.flags = {};
+      _this.io = io;
+      _this.nsp = nsp;
+
+      if (opts && opts.auth) {
+        _this.auth = opts.auth;
+      }
+
+      if (_this.io._autoConnect) _this.open();
+      return _this;
+    }
+    /**
+     * Subscribe to open, close and packet events
+     *
+     * @private
+     */
+
+
+    _createClass(Socket, [{
+      key: "subEvents",
+      value: function subEvents() {
+        if (this.subs) return;
+        var io = this.io;
+        this.subs = [on(io, "open", this.onopen.bind(this)), on(io, "packet", this.onpacket.bind(this)), on(io, "error", this.onerror.bind(this)), on(io, "close", this.onclose.bind(this))];
+      }
+      /**
+       * Whether the Socket will try to reconnect when its Manager connects or reconnects
+       */
+
+    }, {
+      key: "active",
+      get: function get() {
+        return !!this.subs;
+      }
+      /**
+       * "Opens" the socket.
+       *
+       * @public
+       */
+
+    }, {
+      key: "connect",
+      value: function connect() {
+        if (this.connected) return this;
+        this.subEvents();
+        if (!this.io["_reconnecting"]) this.io.open(); // ensure open
+
+        if ("open" === this.io._readyState) this.onopen();
+        return this;
+      }
+      /**
+       * Alias for connect()
+       */
+
+    }, {
+      key: "open",
+      value: function open() {
+        return this.connect();
+      }
+      /**
+       * Sends a `message` event.
+       *
+       * @return self
+       * @public
+       */
+
+    }, {
+      key: "send",
+      value: function send() {
+        for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
+          args[_key] = arguments[_key];
+        }
+
+        args.unshift("message");
+        this.emit.apply(this, args);
+        return this;
+      }
+      /**
+       * Override `emit`.
+       * If the event is in `events`, it's emitted normally.
+       *
+       * @return self
+       * @public
+       */
+
+    }, {
+      key: "emit",
+      value: function emit(ev) {
+        if (RESERVED_EVENTS.hasOwnProperty(ev)) {
+          throw new Error('"' + ev + '" is a reserved event name');
+        }
+
+        for (var _len2 = arguments.length, args = new Array(_len2 > 1 ? _len2 - 1 : 0), _key2 = 1; _key2 < _len2; _key2++) {
+          args[_key2 - 1] = arguments[_key2];
+        }
+
+        args.unshift(ev);
+        var packet = {
+          type: PacketType.EVENT,
+          data: args
+        };
+        packet.options = {};
+        packet.options.compress = this.flags.compress !== false; // event ack callback
+
+        if ("function" === typeof args[args.length - 1]) {
+          var id = this.ids++;
+          var ack = args.pop();
+
+          this._registerAckCallback(id, ack);
+
+          packet.id = id;
+        }
+
+        var isTransportWritable = this.io.engine && this.io.engine.transport && this.io.engine.transport.writable;
+        var discardPacket = this.flags["volatile"] && (!isTransportWritable || !this.connected);
+
+        if (discardPacket) ; else if (this.connected) {
+          this.packet(packet);
+        } else {
+          this.sendBuffer.push(packet);
+        }
+
+        this.flags = {};
+        return this;
+      }
+      /**
+       * @private
+       */
+
+    }, {
+      key: "_registerAckCallback",
+      value: function _registerAckCallback(id, ack) {
+        var _this2 = this;
+
+        var timeout = this.flags.timeout;
+
+        if (timeout === undefined) {
+          this.acks[id] = ack;
+          return;
+        } // @ts-ignore
+
+
+        var timer = this.io.setTimeoutFn(function () {
+          delete _this2.acks[id];
+
+          for (var i = 0; i < _this2.sendBuffer.length; i++) {
+            if (_this2.sendBuffer[i].id === id) {
+              _this2.sendBuffer.splice(i, 1);
+            }
+          }
+
+          ack.call(_this2, new Error("operation has timed out"));
+        }, timeout);
+
+        this.acks[id] = function () {
+          // @ts-ignore
+          _this2.io.clearTimeoutFn(timer);
+
+          for (var _len3 = arguments.length, args = new Array(_len3), _key3 = 0; _key3 < _len3; _key3++) {
+            args[_key3] = arguments[_key3];
+          }
+
+          ack.apply(_this2, [null].concat(args));
+        };
+      }
+      /**
+       * Sends a packet.
+       *
+       * @param packet
+       * @private
+       */
+
+    }, {
+      key: "packet",
+      value: function packet(_packet) {
+        _packet.nsp = this.nsp;
+
+        this.io._packet(_packet);
+      }
+      /**
+       * Called upon engine `open`.
+       *
+       * @private
+       */
+
+    }, {
+      key: "onopen",
+      value: function onopen() {
+        var _this3 = this;
+
+        if (typeof this.auth == "function") {
+          this.auth(function (data) {
+            _this3.packet({
+              type: PacketType.CONNECT,
+              data: data
+            });
+          });
+        } else {
+          this.packet({
+            type: PacketType.CONNECT,
+            data: this.auth
+          });
+        }
+      }
+      /**
+       * Called upon engine or manager `error`.
+       *
+       * @param err
+       * @private
+       */
+
+    }, {
+      key: "onerror",
+      value: function onerror(err) {
+        if (!this.connected) {
+          this.emitReserved("connect_error", err);
+        }
+      }
+      /**
+       * Called upon engine `close`.
+       *
+       * @param reason
+       * @private
+       */
+
+    }, {
+      key: "onclose",
+      value: function onclose(reason) {
+        this.connected = false;
+        this.disconnected = true;
+        delete this.id;
+        this.emitReserved("disconnect", reason);
+      }
+      /**
+       * Called with socket packet.
+       *
+       * @param packet
+       * @private
+       */
+
+    }, {
+      key: "onpacket",
+      value: function onpacket(packet) {
+        var sameNamespace = packet.nsp === this.nsp;
+        if (!sameNamespace) return;
+
+        switch (packet.type) {
+          case PacketType.CONNECT:
+            if (packet.data && packet.data.sid) {
+              var id = packet.data.sid;
+              this.onconnect(id);
+            } else {
+              this.emitReserved("connect_error", new Error("It seems you are trying to reach a Socket.IO server in v2.x with a v3.x client, but they are not compatible (more information here: https://socket.io/docs/v3/migrating-from-2-x-to-3-0/)"));
+            }
+
+            break;
+
+          case PacketType.EVENT:
+            this.onevent(packet);
+            break;
+
+          case PacketType.BINARY_EVENT:
+            this.onevent(packet);
+            break;
+
+          case PacketType.ACK:
+            this.onack(packet);
+            break;
+
+          case PacketType.BINARY_ACK:
+            this.onack(packet);
+            break;
+
+          case PacketType.DISCONNECT:
+            this.ondisconnect();
+            break;
+
+          case PacketType.CONNECT_ERROR:
+            this.destroy();
+            var err = new Error(packet.data.message); // @ts-ignore
+
+            err.data = packet.data.data;
+            this.emitReserved("connect_error", err);
+            break;
+        }
+      }
+      /**
+       * Called upon a server event.
+       *
+       * @param packet
+       * @private
+       */
+
+    }, {
+      key: "onevent",
+      value: function onevent(packet) {
+        var args = packet.data || [];
+
+        if (null != packet.id) {
+          args.push(this.ack(packet.id));
+        }
+
+        if (this.connected) {
+          this.emitEvent(args);
+        } else {
+          this.receiveBuffer.push(Object.freeze(args));
+        }
+      }
+    }, {
+      key: "emitEvent",
+      value: function emitEvent(args) {
+        if (this._anyListeners && this._anyListeners.length) {
+          var listeners = this._anyListeners.slice();
+
+          var _iterator = _createForOfIteratorHelper(listeners),
+              _step;
+
+          try {
+            for (_iterator.s(); !(_step = _iterator.n()).done;) {
+              var listener = _step.value;
+              listener.apply(this, args);
+            }
+          } catch (err) {
+            _iterator.e(err);
+          } finally {
+            _iterator.f();
+          }
+        }
+
+        _get(_getPrototypeOf(Socket.prototype), "emit", this).apply(this, args);
+      }
+      /**
+       * Produces an ack callback to emit with an event.
+       *
+       * @private
+       */
+
+    }, {
+      key: "ack",
+      value: function ack(id) {
+        var self = this;
+        var sent = false;
+        return function () {
+          // prevent double callbacks
+          if (sent) return;
+          sent = true;
+
+          for (var _len4 = arguments.length, args = new Array(_len4), _key4 = 0; _key4 < _len4; _key4++) {
+            args[_key4] = arguments[_key4];
+          }
+
+          self.packet({
+            type: PacketType.ACK,
+            id: id,
+            data: args
+          });
+        };
+      }
+      /**
+       * Called upon a server acknowlegement.
+       *
+       * @param packet
+       * @private
+       */
+
+    }, {
+      key: "onack",
+      value: function onack(packet) {
+        var ack = this.acks[packet.id];
+
+        if ("function" === typeof ack) {
+          ack.apply(this, packet.data);
+          delete this.acks[packet.id];
+        }
+      }
+      /**
+       * Called upon server connect.
+       *
+       * @private
+       */
+
+    }, {
+      key: "onconnect",
+      value: function onconnect(id) {
+        this.id = id;
+        this.connected = true;
+        this.disconnected = false;
+        this.emitBuffered();
+        this.emitReserved("connect");
+      }
+      /**
+       * Emit buffered events (received and emitted).
+       *
+       * @private
+       */
+
+    }, {
+      key: "emitBuffered",
+      value: function emitBuffered() {
+        var _this4 = this;
+
+        this.receiveBuffer.forEach(function (args) {
+          return _this4.emitEvent(args);
+        });
+        this.receiveBuffer = [];
+        this.sendBuffer.forEach(function (packet) {
+          return _this4.packet(packet);
+        });
+        this.sendBuffer = [];
+      }
+      /**
+       * Called upon server disconnect.
+       *
+       * @private
+       */
+
+    }, {
+      key: "ondisconnect",
+      value: function ondisconnect() {
+        this.destroy();
+        this.onclose("io server disconnect");
+      }
+      /**
+       * Called upon forced client/server side disconnections,
+       * this method ensures the manager stops tracking us and
+       * that reconnections don't get triggered for this.
+       *
+       * @private
+       */
+
+    }, {
+      key: "destroy",
+      value: function destroy() {
+        if (this.subs) {
+          // clean subscriptions to avoid reconnections
+          this.subs.forEach(function (subDestroy) {
+            return subDestroy();
+          });
+          this.subs = undefined;
+        }
+
+        this.io["_destroy"](this);
+      }
+      /**
+       * Disconnects the socket manually.
+       *
+       * @return self
+       * @public
+       */
+
+    }, {
+      key: "disconnect",
+      value: function disconnect() {
+        if (this.connected) {
+          this.packet({
+            type: PacketType.DISCONNECT
+          });
+        } // remove socket from pool
+
+
+        this.destroy();
+
+        if (this.connected) {
+          // fire events
+          this.onclose("io client disconnect");
+        }
+
+        return this;
+      }
+      /**
+       * Alias for disconnect()
+       *
+       * @return self
+       * @public
+       */
+
+    }, {
+      key: "close",
+      value: function close() {
+        return this.disconnect();
+      }
+      /**
+       * Sets the compress flag.
+       *
+       * @param compress - if `true`, compresses the sending data
+       * @return self
+       * @public
+       */
+
+    }, {
+      key: "compress",
+      value: function compress(_compress) {
+        this.flags.compress = _compress;
+        return this;
+      }
+      /**
+       * Sets a modifier for a subsequent event emission that the event message will be dropped when this socket is not
+       * ready to send messages.
+       *
+       * @returns self
+       * @public
+       */
+
+    }, {
+      key: "volatile",
+      get: function get() {
+        this.flags["volatile"] = true;
+        return this;
+      }
+      /**
+       * Sets a modifier for a subsequent event emission that the callback will be called with an error when the
+       * given number of milliseconds have elapsed without an acknowledgement from the server:
+       *
+       * ```
+       * socket.timeout(5000).emit("my-event", (err) => {
+       *   if (err) {
+       *     // the server did not acknowledge the event in the given delay
+       *   }
+       * });
+       * ```
+       *
+       * @returns self
+       * @public
+       */
+
+    }, {
+      key: "timeout",
+      value: function timeout(_timeout) {
+        this.flags.timeout = _timeout;
+        return this;
+      }
+      /**
+       * Adds a listener that will be fired when any event is emitted. The event name is passed as the first argument to the
+       * callback.
+       *
+       * @param listener
+       * @public
+       */
+
+    }, {
+      key: "onAny",
+      value: function onAny(listener) {
+        this._anyListeners = this._anyListeners || [];
+
+        this._anyListeners.push(listener);
+
+        return this;
+      }
+      /**
+       * Adds a listener that will be fired when any event is emitted. The event name is passed as the first argument to the
+       * callback. The listener is added to the beginning of the listeners array.
+       *
+       * @param listener
+       * @public
+       */
+
+    }, {
+      key: "prependAny",
+      value: function prependAny(listener) {
+        this._anyListeners = this._anyListeners || [];
+
+        this._anyListeners.unshift(listener);
+
+        return this;
+      }
+      /**
+       * Removes the listener that will be fired when any event is emitted.
+       *
+       * @param listener
+       * @public
+       */
+
+    }, {
+      key: "offAny",
+      value: function offAny(listener) {
+        if (!this._anyListeners) {
+          return this;
+        }
+
+        if (listener) {
+          var listeners = this._anyListeners;
+
+          for (var i = 0; i < listeners.length; i++) {
+            if (listener === listeners[i]) {
+              listeners.splice(i, 1);
+              return this;
+            }
+          }
+        } else {
+          this._anyListeners = [];
+        }
+
+        return this;
+      }
+      /**
+       * Returns an array of listeners that are listening for any event that is specified. This array can be manipulated,
+       * e.g. to remove listeners.
+       *
+       * @public
+       */
+
+    }, {
+      key: "listenersAny",
+      value: function listenersAny() {
+        return this._anyListeners || [];
+      }
+    }]);
+
+    return Socket;
+  }(Emitter_1);
+
+  /**
+   * Expose `Backoff`.
+   */
+
+  var backo2 = Backoff;
+  /**
+   * Initialize backoff timer with `opts`.
+   *
+   * - `min` initial timeout in milliseconds [100]
+   * - `max` max timeout [10000]
+   * - `jitter` [0]
+   * - `factor` [2]
+   *
+   * @param {Object} opts
+   * @api public
+   */
+
+  function Backoff(opts) {
+    opts = opts || {};
+    this.ms = opts.min || 100;
+    this.max = opts.max || 10000;
+    this.factor = opts.factor || 2;
+    this.jitter = opts.jitter > 0 && opts.jitter <= 1 ? opts.jitter : 0;
+    this.attempts = 0;
+  }
+  /**
+   * Return the backoff duration.
+   *
+   * @return {Number}
+   * @api public
+   */
+
+
+  Backoff.prototype.duration = function () {
+    var ms = this.ms * Math.pow(this.factor, this.attempts++);
+
+    if (this.jitter) {
+      var rand = Math.random();
+      var deviation = Math.floor(rand * this.jitter * ms);
+      ms = (Math.floor(rand * 10) & 1) == 0 ? ms - deviation : ms + deviation;
+    }
+
+    return Math.min(ms, this.max) | 0;
+  };
+  /**
+   * Reset the number of attempts.
+   *
+   * @api public
+   */
+
+
+  Backoff.prototype.reset = function () {
+    this.attempts = 0;
+  };
+  /**
+   * Set the minimum duration
+   *
+   * @api public
+   */
+
+
+  Backoff.prototype.setMin = function (min) {
+    this.ms = min;
+  };
+  /**
+   * Set the maximum duration
+   *
+   * @api public
+   */
+
+
+  Backoff.prototype.setMax = function (max) {
+    this.max = max;
+  };
+  /**
+   * Set the jitter
+   *
+   * @api public
+   */
+
+
+  Backoff.prototype.setJitter = function (jitter) {
+    this.jitter = jitter;
+  };
+
+  var Manager = /*#__PURE__*/function (_Emitter) {
+    _inherits(Manager, _Emitter);
+
+    var _super = _createSuper(Manager);
+
+    function Manager(uri, opts) {
+      var _this;
+
+      _classCallCheck(this, Manager);
+
+      var _a;
+
+      _this = _super.call(this);
+      _this.nsps = {};
+      _this.subs = [];
+
+      if (uri && "object" === _typeof(uri)) {
+        opts = uri;
+        uri = undefined;
+      }
+
+      opts = opts || {};
+      opts.path = opts.path || "/socket.io";
+      _this.opts = opts;
+      installTimerFunctions(_assertThisInitialized(_this), opts);
+
+      _this.reconnection(opts.reconnection !== false);
+
+      _this.reconnectionAttempts(opts.reconnectionAttempts || Infinity);
+
+      _this.reconnectionDelay(opts.reconnectionDelay || 1000);
+
+      _this.reconnectionDelayMax(opts.reconnectionDelayMax || 5000);
+
+      _this.randomizationFactor((_a = opts.randomizationFactor) !== null && _a !== void 0 ? _a : 0.5);
+
+      _this.backoff = new backo2({
+        min: _this.reconnectionDelay(),
+        max: _this.reconnectionDelayMax(),
+        jitter: _this.randomizationFactor()
+      });
+
+      _this.timeout(null == opts.timeout ? 20000 : opts.timeout);
+
+      _this._readyState = "closed";
+      _this.uri = uri;
+
+      var _parser = opts.parser || parser;
+
+      _this.encoder = new _parser.Encoder();
+      _this.decoder = new _parser.Decoder();
+      _this._autoConnect = opts.autoConnect !== false;
+      if (_this._autoConnect) _this.open();
+      return _this;
+    }
+
+    _createClass(Manager, [{
+      key: "reconnection",
+      value: function reconnection(v) {
+        if (!arguments.length) return this._reconnection;
+        this._reconnection = !!v;
+        return this;
+      }
+    }, {
+      key: "reconnectionAttempts",
+      value: function reconnectionAttempts(v) {
+        if (v === undefined) return this._reconnectionAttempts;
+        this._reconnectionAttempts = v;
+        return this;
+      }
+    }, {
+      key: "reconnectionDelay",
+      value: function reconnectionDelay(v) {
+        var _a;
+
+        if (v === undefined) return this._reconnectionDelay;
+        this._reconnectionDelay = v;
+        (_a = this.backoff) === null || _a === void 0 ? void 0 : _a.setMin(v);
+        return this;
+      }
+    }, {
+      key: "randomizationFactor",
+      value: function randomizationFactor(v) {
+        var _a;
+
+        if (v === undefined) return this._randomizationFactor;
+        this._randomizationFactor = v;
+        (_a = this.backoff) === null || _a === void 0 ? void 0 : _a.setJitter(v);
+        return this;
+      }
+    }, {
+      key: "reconnectionDelayMax",
+      value: function reconnectionDelayMax(v) {
+        var _a;
+
+        if (v === undefined) return this._reconnectionDelayMax;
+        this._reconnectionDelayMax = v;
+        (_a = this.backoff) === null || _a === void 0 ? void 0 : _a.setMax(v);
+        return this;
+      }
+    }, {
+      key: "timeout",
+      value: function timeout(v) {
+        if (!arguments.length) return this._timeout;
+        this._timeout = v;
+        return this;
+      }
+      /**
+       * Starts trying to reconnect if reconnection is enabled and we have not
+       * started reconnecting yet
+       *
+       * @private
+       */
+
+    }, {
+      key: "maybeReconnectOnOpen",
+      value: function maybeReconnectOnOpen() {
+        // Only try to reconnect if it's the first time we're connecting
+        if (!this._reconnecting && this._reconnection && this.backoff.attempts === 0) {
+          // keeps reconnection from firing twice for the same reconnection loop
+          this.reconnect();
+        }
+      }
+      /**
+       * Sets the current transport `socket`.
+       *
+       * @param {Function} fn - optional, callback
+       * @return self
+       * @public
+       */
+
+    }, {
+      key: "open",
+      value: function open(fn) {
+        var _this2 = this;
+
+        if (~this._readyState.indexOf("open")) return this;
+        this.engine = new Socket$1(this.uri, this.opts);
+        var socket = this.engine;
+        var self = this;
+        this._readyState = "opening";
+        this.skipReconnect = false; // emit `open`
+
+        var openSubDestroy = on(socket, "open", function () {
+          self.onopen();
+          fn && fn();
+        }); // emit `error`
+
+        var errorSub = on(socket, "error", function (err) {
+          self.cleanup();
+          self._readyState = "closed";
+
+          _this2.emitReserved("error", err);
+
+          if (fn) {
+            fn(err);
+          } else {
+            // Only do this if there is no fn to handle the error
+            self.maybeReconnectOnOpen();
+          }
+        });
+
+        if (false !== this._timeout) {
+          var timeout = this._timeout;
+
+          if (timeout === 0) {
+            openSubDestroy(); // prevents a race condition with the 'open' event
+          } // set timer
+
+
+          var timer = this.setTimeoutFn(function () {
+            openSubDestroy();
+            socket.close(); // @ts-ignore
+
+            socket.emit("error", new Error("timeout"));
+          }, timeout);
+
+          if (this.opts.autoUnref) {
+            timer.unref();
+          }
+
+          this.subs.push(function subDestroy() {
+            clearTimeout(timer);
+          });
+        }
+
+        this.subs.push(openSubDestroy);
+        this.subs.push(errorSub);
+        return this;
+      }
+      /**
+       * Alias for open()
+       *
+       * @return self
+       * @public
+       */
+
+    }, {
+      key: "connect",
+      value: function connect(fn) {
+        return this.open(fn);
+      }
+      /**
+       * Called upon transport open.
+       *
+       * @private
+       */
+
+    }, {
+      key: "onopen",
+      value: function onopen() {
+        // clear old subs
+        this.cleanup(); // mark as open
+
+        this._readyState = "open";
+        this.emitReserved("open"); // add new subs
+
+        var socket = this.engine;
+        this.subs.push(on(socket, "ping", this.onping.bind(this)), on(socket, "data", this.ondata.bind(this)), on(socket, "error", this.onerror.bind(this)), on(socket, "close", this.onclose.bind(this)), on(this.decoder, "decoded", this.ondecoded.bind(this)));
+      }
+      /**
+       * Called upon a ping.
+       *
+       * @private
+       */
+
+    }, {
+      key: "onping",
+      value: function onping() {
+        this.emitReserved("ping");
+      }
+      /**
+       * Called with data.
+       *
+       * @private
+       */
+
+    }, {
+      key: "ondata",
+      value: function ondata(data) {
+        this.decoder.add(data);
+      }
+      /**
+       * Called when parser fully decodes a packet.
+       *
+       * @private
+       */
+
+    }, {
+      key: "ondecoded",
+      value: function ondecoded(packet) {
+        this.emitReserved("packet", packet);
+      }
+      /**
+       * Called upon socket error.
+       *
+       * @private
+       */
+
+    }, {
+      key: "onerror",
+      value: function onerror(err) {
+        this.emitReserved("error", err);
+      }
+      /**
+       * Creates a new socket for the given `nsp`.
+       *
+       * @return {Socket}
+       * @public
+       */
+
+    }, {
+      key: "socket",
+      value: function socket(nsp, opts) {
+        var socket = this.nsps[nsp];
+
+        if (!socket) {
+          socket = new Socket(this, nsp, opts);
+          this.nsps[nsp] = socket;
+        }
+
+        return socket;
+      }
+      /**
+       * Called upon a socket close.
+       *
+       * @param socket
+       * @private
+       */
+
+    }, {
+      key: "_destroy",
+      value: function _destroy(socket) {
+        var nsps = Object.keys(this.nsps);
+
+        for (var _i = 0, _nsps = nsps; _i < _nsps.length; _i++) {
+          var nsp = _nsps[_i];
+          var _socket = this.nsps[nsp];
+
+          if (_socket.active) {
+            return;
+          }
+        }
+
+        this._close();
+      }
+      /**
+       * Writes a packet.
+       *
+       * @param packet
+       * @private
+       */
+
+    }, {
+      key: "_packet",
+      value: function _packet(packet) {
+        var encodedPackets = this.encoder.encode(packet);
+
+        for (var i = 0; i < encodedPackets.length; i++) {
+          this.engine.write(encodedPackets[i], packet.options);
+        }
+      }
+      /**
+       * Clean up transport subscriptions and packet buffer.
+       *
+       * @private
+       */
+
+    }, {
+      key: "cleanup",
+      value: function cleanup() {
+        this.subs.forEach(function (subDestroy) {
+          return subDestroy();
+        });
+        this.subs.length = 0;
+        this.decoder.destroy();
+      }
+      /**
+       * Close the current socket.
+       *
+       * @private
+       */
+
+    }, {
+      key: "_close",
+      value: function _close() {
+        this.skipReconnect = true;
+        this._reconnecting = false;
+        this.onclose("forced close");
+        if (this.engine) this.engine.close();
+      }
+      /**
+       * Alias for close()
+       *
+       * @private
+       */
+
+    }, {
+      key: "disconnect",
+      value: function disconnect() {
+        return this._close();
+      }
+      /**
+       * Called upon engine close.
+       *
+       * @private
+       */
+
+    }, {
+      key: "onclose",
+      value: function onclose(reason) {
+        this.cleanup();
+        this.backoff.reset();
+        this._readyState = "closed";
+        this.emitReserved("close", reason);
+
+        if (this._reconnection && !this.skipReconnect) {
+          this.reconnect();
+        }
+      }
+      /**
+       * Attempt a reconnection.
+       *
+       * @private
+       */
+
+    }, {
+      key: "reconnect",
+      value: function reconnect() {
+        var _this3 = this;
+
+        if (this._reconnecting || this.skipReconnect) return this;
+        var self = this;
+
+        if (this.backoff.attempts >= this._reconnectionAttempts) {
+          this.backoff.reset();
+          this.emitReserved("reconnect_failed");
+          this._reconnecting = false;
+        } else {
+          var delay = this.backoff.duration();
+          this._reconnecting = true;
+          var timer = this.setTimeoutFn(function () {
+            if (self.skipReconnect) return;
+
+            _this3.emitReserved("reconnect_attempt", self.backoff.attempts); // check again for the case socket closed in above events
+
+
+            if (self.skipReconnect) return;
+            self.open(function (err) {
+              if (err) {
+                self._reconnecting = false;
+                self.reconnect();
+
+                _this3.emitReserved("reconnect_error", err);
+              } else {
+                self.onreconnect();
+              }
+            });
+          }, delay);
+
+          if (this.opts.autoUnref) {
+            timer.unref();
+          }
+
+          this.subs.push(function subDestroy() {
+            clearTimeout(timer);
+          });
+        }
+      }
+      /**
+       * Called upon successful reconnect.
+       *
+       * @private
+       */
+
+    }, {
+      key: "onreconnect",
+      value: function onreconnect() {
+        var attempt = this.backoff.attempts;
+        this._reconnecting = false;
+        this.backoff.reset();
+        this.emitReserved("reconnect", attempt);
+      }
+    }]);
+
+    return Manager;
+  }(Emitter_1);
+
+  /**
+   * Managers cache.
+   */
+
+  var cache = {};
+
+  function lookup(uri, opts) {
+    if (_typeof(uri) === "object") {
+      opts = uri;
+      uri = undefined;
+    }
+
+    opts = opts || {};
+    var parsed = url(uri, opts.path || "/socket.io");
+    var source = parsed.source;
+    var id = parsed.id;
+    var path = parsed.path;
+    var sameNamespace = cache[id] && path in cache[id]["nsps"];
+    var newConnection = opts.forceNew || opts["force new connection"] || false === opts.multiplex || sameNamespace;
+    var io;
+
+    if (newConnection) {
+      io = new Manager(source, opts);
+    } else {
+      if (!cache[id]) {
+        cache[id] = new Manager(source, opts);
+      }
+
+      io = cache[id];
+    }
+
+    if (parsed.query && !opts.query) {
+      opts.query = parsed.queryKey;
+    }
+
+    return io.socket(parsed.path, opts);
+  } // so that "lookup" can be used both as a function (e.g. `io(...)`) and as a
+  // namespace (e.g. `io.connect(...)`), for backward compatibility
+
+
+  _extends(lookup, {
+    Manager: Manager,
+    Socket: Socket,
+    io: lookup,
+    connect: lookup
+  });
+
+  return lookup;
+
+}));
+//# sourceMappingURL=socket.io.js.map
