byteLength访问器属性表示一个ArrayBuffer 对象的字节长度。
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arraybuffer.byteLengthbyteLength属性是一个访问器属性，它的set访问器函数是undefined，这意味着你只能读这个属性。 该值在数组创建时确定，并且不可变更。如果这个ArrayBuffer 被移除，则此属性返回0。
var buffer = new ArrayBuffer(8);
buffer.byteLength; // 8
| 规范 | 状态 | 备注 |
|---|---|---|
| Typed Array Specification | Obsolete | Superseded by ECMAScript 6. |
| ECMAScript 2015 (6th Edition, ECMA-262) ArrayBuffer.prototype.byteLength |
Standard | Initial definition in an ECMA standard. |
| Desktop | Mobile | Server | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
byteLength | Chrome Full support 7 | Edge Full support 12 | Firefox Full support 4 | IE Full support 10 | Opera Full support 11.6 | Safari Full support 5.1 | WebView Android Full support 4 | Chrome Android Full support Yes | Edge Mobile Full support Yes | Firefox Android Full support 4 | Opera Android Full support 11.6 | Safari iOS Full support 4.2 | Samsung Internet Android Full support Yes | nodejs Full support Yes |