Hello, I read the stl file with base64 to get the string of base64, and then call your function. Why can't I display the 3D effect

[linhuanfeng]

Describe the bug

testLoad();
var str =
'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';

function testLoad() {
console.log('tesload');
// var f1 = base64toFile(str);
// var f2 = base64ToBlob(str, '.stl');

console.log('tesload1');
// loader.loadFile(f1);
// loader.loadString(f1);
// loader.loadBinaryData(f1);
// loader.loadFile(f1);

console.log('tesload2');

// loader.loadFile(f2);
// loader.loadString(f2);
// loader.loadBinaryData(f2);
// loader.loadFile(f2);

console.log('tesload3');

// loader.loadFile(str);
loader.loadString(str);
loader.loadBinaryData(str);
loader.loadFile(str);

// var to = base64ToBlob(str, 'zip');
// loader.loadFile(base64ToBlob(to));
// loader.loadString(to);
// loader.loadBinaryData(to);
// loader.loadFile(to);
}

function base64ToBlob(code, suffix) {
code = code.replace(/[\n\r]/g, '');
// atob() 方法用于解码使用 base-64 编码的字符串。
const raw = window.atob(code);
const rawLength = raw.length;
const uInt8Array = new Uint8Array(rawLength);
for (let i = 0; i < rawLength; ++i) {
uInt8Array[i] = raw.charCodeAt(i);
}
return new Blob([uInt8Array], {type: application/${suffix}});
}

Reproduction

thanks

System Info

tesload3
main.js:91 TypeError: Cannot read properties of undefined (reading 'getUint32')
    at STLLoader.loadBinaryData (stl.js:182:26)
    at testLoad (main.js:1169:10)
    at main.js:1143:1
errorHandler @ main.js:91
STLLoader.loadBinaryData @ stl.js:184
testLoad @ main.js:1169
(anonymous) @ main.js:1143
stl.js:128 Uncaught TypeError: Failed to execute 'readAsArrayBuffer' on 'FileReader': parameter 1 is not of type 'Blob'.
    at STLLoader.loadFile (stl.js:128:12)
    at testLoad (main.js:1170:10)
    at main.js:1143:1
STLLoader.loadFile @ stl.js:128
testLoad @ main.js:1170
(anonymous) @ main.js:1143
translate.google.com/gen204?nca=te_li&client=te_lib&logld=vTE_20230827:1     GET file://translate.google.com/gen204?nca=te_li&client=te_lib&logld=vTE_20230827 net::ERR_FILE_NOT_FOUND
Image (async)
dn @ VM677:241
eval @ VM677:503
eval @ VM677:507
xhr.onreadystatechange @ m=el_conf:430
XMLHttpRequest.send (async)
onLoadJavascript @ m=el_conf:432
(anonymous) @ m=el_conf:640
(anonymous) @ m=el_conf:641
(anonymous) @ m=el_conf:642
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translate.google.com/gen204?sl=en&tl=zh-CN&textlen=16&ttt=363&ttl=43&ttf=299&sr=1&nca=te_time&client=te_lib&logld=vTE_20230827:1     GET file://translate.google.com/gen204?sl=en&tl=zh-CN&textlen=16&ttt=363&ttl=43&ttf=299&sr=1&nca=te_time&client=te_lib&logld=vTE_20230827 net::ERR_FILE_NOT_FOUND

Used Package Manager

npm

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• The provided reproduction is a minimal reproducible of the bug.