byteLength
属性描述了视图从它的 ArrayBuffer
开始的字节长度。
The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.
语法
dataview.byteLength
描述
byteLength
属性是一个获取(accessor)属性,它的 set 属性为 undefined,这意味着它是只读的。值在 DataView 被创建时就确定了,且不能改变。如果
DataView
没有指定偏移量或byteLength,那么被引用的 ArrayBuffer 的字节长度将被返回。
Examples
Using the byteLength
property
var buffer = new ArrayBuffer(8); var dataview = new DataView(buffer); dataview.byteLength; // 8 (matches the byteLength of the buffer) var dataview2 = new DataView(buffer, 1, 5); dataview2.byteLength; // 5 (as specified when constructing the DataView) var dataview3 = new DataView(buffer, 2); dataview3.byteLength; // 6 (due to the offset of the constructed DataView)
规范
Specification | Status | Comment |
---|---|---|
ECMAScript 2015 (6th Edition, ECMA-262) DataView.prototype.byteLength |
Standard | Initial definition. |
ECMAScript Latest Draft (ECMA-262) DataView.prototype.byteLength |
Draft |
浏览器兼容性
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out
https://github.com/mdn/browser-compat-data and send us a pull request.
Update compatibility data on GitHub
Desktop | Mobile | Server | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
byteLength |
Chrome Full support 9 | Edge Full support 12 | Firefox Full support 15 | IE Full support 10 | Opera Full support 12.1 | Safari Full support 5.1 | WebView Android Full support 4 | Chrome Android Full support 18 | Firefox Android Full support 15 | Opera Android Full support 12.1 | Safari iOS Full support 4.2 | Samsung Internet Android Full support Yes | nodejs Full support Yes |
Legend
- Full support
- Full support