typedArray.byteLength
typedArray.byteLength
byteLength访问器属性表示类型化数组的长度（字节数）。
语法
typedarray.byteLength
描述
byteLength是一个访问器属性，它的 set 访问器函数是undefined，意思是你只能够读取这个属性。它的值在TypedArray构造时建立，不能被修改。如果TypedArray没有指定byteOffset或者length，会返回所引用的ArrayBuffer的length。TypedArray是这里的TypedArray 对象之一。
示例
使用byteLength 属性
var buffer = new ArrayBuffer(8
var uint8 = new Uint8Array(buffer
uint8.byteLength; // 8 (matches the byteLength of the buffer)
var uint8 = new Uint8Array(buffer, 1, 5
uint8.byteLength; // 5 (as specified when constructing the Uint8Array)
var uint8 = new Uint8Array(buffer, 2
uint8.byteLength; // 6 (due to the offset of the constructed Uint8Array)
规范
| Specification | Status | Comment |
|---|---|---|
| ECMAScript 2015 (6th Edition, ECMA-262)The definition of 'TypedArray.prototype.byteLength' in that specification. | Standard | Initial definition. |
| ECMAScript Latest Draft (ECMA-262)The definition of 'TypedArray.prototype.byteLength' in that specification. | Draft | |
浏览器兼容性
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|
| Basic support | 7.0 | 4.0 (2) | 10 | 11.6 | 5.1 |
| Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|
| Basic support | 4.0 | (Yes) | 4.0 (2) | 10 | 11.6 | 4.2 |
