client.js

var connection = new WebSocket('ws://localhost:9090'); 
var name = "";

var loginInput = document.querySelector('#loginInput'); 
var loginBtn = document.querySelector('#loginBtn'); 

var otherUsernameInput = document.querySelector('#otherUsernameInput'); 
var connectToOtherUsernameBtn = document.querySelector('#connectToOtherUsernameBtn'); 
var msgInput = document.querySelector('#msgInput'); 
var sendMsgBtn = document.querySelector('#sendMsgBtn'); 
var connectedUser, myConnection, dataChannel;
  
//when a user clicks the login button 
loginBtn.addEventListener("click", function(event) { 
   name = loginInput.value; 
	
   if(name.length > 0) { 
      send({ 
         type: "login", 
         name: name 
      }); 
   } 
}); 
 
//handle messages from the server 
connection.onmessage = function (message) { 
   console.log("Got message", message.data); 
   var data = JSON.parse(message.data); 
	
   switch(data.type) { 
      case "login": 
         onLogin(data.success); 
         break; 
      case "offer": 
         onOffer(data.offer, data.name); 
         break; 
      case "answer":
         onAnswer(data.answer); 
         break; 
      case "candidate": 
         onCandidate(data.candidate); 
         break; 
      default: 
         break; 
   } 
}; 
 
//when a user logs in 
function onLogin(success) { 

   if (success === false) { 
      alert("oops...try a different username"); 
   } else { 
      //creating our RTCPeerConnection object 
      var configuration = { 
         "iceServers": [{ "url": "stun:stun.1.google.com:19302" }] 
      }; 
		
      myConnection = new webkitRTCPeerConnection(configuration, { 
         optional: [{RtpDataChannels: true}] 
      }); 
		
      console.log("RTCPeerConnection object was created"); 
      console.log(myConnection); 
  
      //setup ice handling 
      //when the browser finds an ice candidate we send it to another peer 
      myConnection.onicecandidate = function (event) { 
		
         if (event.candidate) { 
            send({ 
               type: "candidate", 
               candidate: event.candidate 
            });
         } 
      }; 
		
      openDataChannel();
		
   } 
};
  
connection.onopen = function () { 
   console.log("Connected"); 
}; 
 
connection.onerror = function (err) { 
   console.log("Got error", err); 
};
  
// Alias for sending messages in JSON format 
function send(message) { 
   if (connectedUser) { 
      message.name = connectedUser; 
   }
	
   connection.send(JSON.stringify(message)); 
};