在此页

• 构造函数
• 静态特性
• 静态方法
• 实例特性
• 实例方法
• 范例
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

ArrayBuffer object is used to represent a generic, fixed-length raw binary data buffer.

It is an array of bytes, often referred to in other languages as a "byte array".You cannot directly manipulate the contents of an ArrayBuffer ; instead, you create one of the typed array objects 或 DataView object which represents the buffer in a specific format, and use that to read and write the contents of the buffer.

ArrayBuffer() 构造函数创建新 ArrayBuffer of the given length in bytes. You can also get an array buffer from existing data, for example from a Base64 string or from a local file .

构造函数

ArrayBuffer()

创建新的 ArrayBuffer 对象。

静态特性

get ArrayBuffer[@@species]

The constructor function that is used to create derived objects.

静态方法

ArrayBuffer.isView( arg )

返回 true if arg is one of the ArrayBuffer views, such as typed array objects 或 DataView 。返回 false 否则。

实例特性

ArrayBuffer.prototype.byteLength

The read-only size, in bytes, of the ArrayBuffer . This is established when the array is constructed and cannot be changed.

实例方法

ArrayBuffer.prototype.slice()

返回新的 ArrayBuffer whose contents are a copy of this ArrayBuffer 's bytes from begin (inclusive) up to end (exclusive). If either begin or end is negative, it refers to an index from the end of the array, as opposed to from the beginning.

范例

Creating an ArrayBuffer

In this example, we create a 8-byte buffer with a Int32Array view referring to the buffer:

const buffer = new ArrayBuffer(8);
const view = new Int32Array(buffer);
					

规范

规范
ECMAScript (ECMA-262) The definition of 'ArrayBuffer' in that specification.

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. 更新 GitHub 上的兼容性数据

	Desktop						Mobile						Server
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet	Node.js
ArrayBuffer	Chrome 7	Edge 12	Firefox 4	IE 10	Opera 11.6	Safari 5.1	WebView Android 4	Chrome Android 18	Firefox Android 4	Opera Android 12	Safari iOS 4.2	Samsung Internet Android 1.0	nodejs 0.10
ArrayBuffer() 构造函数	Chrome 7	Edge 12	Firefox 4	IE 10	Opera 11.6	Safari 5.1	WebView Android 4	Chrome Android 18	Firefox Android 4	Opera Android 12	Safari iOS 4.2	Samsung Internet Android 1.0	nodejs 0.10
byteLength	Chrome 7	Edge 12	Firefox 4	IE 10	Opera 11.6	Safari 5.1	WebView Android 4	Chrome Android 18	Firefox Android 4	Opera Android 12	Safari iOS 4.2	Samsung Internet Android 1.0	nodejs 0.10
isView	Chrome 32	Edge 12	Firefox 29	IE 11	Opera 19	Safari 7	WebView Android ≤37	Chrome Android 32	Firefox Android 29	Opera Android 19	Safari iOS 7	Samsung Internet Android 2.0	nodejs 4.0.0
slice	Chrome 17	Edge 12	Firefox 12 12 The non-standard ArrayBuffer.slice() method has been removed in Firefox 53 (but the standardized version ArrayBuffer.prototype.slice() is kept.	IE 11	Opera 12.1	Safari 6	WebView Android ≤37	Chrome Android 18	Firefox Android 14 14 The non-standard ArrayBuffer.slice() method has been removed in Firefox 53 (but the standardized version ArrayBuffer.prototype.slice() is kept.	Opera Android 12.1	Safari iOS 6	Samsung Internet Android 1.0	nodejs 0.12
@@species	Chrome 51	Edge 13	Firefox 48	IE No	Opera 38	Safari 10	WebView Android 51	Chrome Android 51	Firefox Android 48	Opera Android 41	Safari iOS 10	Samsung Internet Android 5.0	nodejs 6.5.0 6.5.0 6.0.0 Disabled Disabled From version 6.0.0: this feature is behind the --harmony runtime flag.

图例

完整支持

完整支持

不支持

不支持

见实现注意事项。

用户必须明确启用此特征。

用户必须明确启用此特征。

另请参阅

• JavaScript 类型数组
• SharedArrayBuffer

元数据

• 最后修改： Jun 4, 2020

相关话题

1. 标准内置对象
2. ArrayBuffer
3. 特性
   1. ArrayBuffer.prototype.byteLength
   2. get ArrayBuffer[@@species]
4. 方法
   1. ArrayBuffer.isView()
   2. ArrayBuffer.prototype.slice()
5. 继承：
6. Function
7. 特性
   1. Function.arguments
   2. Function.caller
   3. Function.displayName
   4. Function.length
   5. Function.name
8. 方法
   1. Function.prototype.apply()
   2. Function.prototype.bind()
   3. Function.prototype.call()
   4. Function.prototype.toSource()
   5. Function.prototype.toString()
9. Object
10. 特性
    1. Object.prototype.__proto__
    2. Object.prototype.constructor
11. 方法
    1. Object.prototype.__defineGetter__()
    2. Object.prototype.__defineSetter__()
    3. Object.prototype.__lookupGetter__()
    4. Object.prototype.__lookupSetter__()
    5. Object.prototype.hasOwnProperty()
    6. Object.prototype.isPrototypeOf()
    7. Object.prototype.propertyIsEnumerable()
    8. Object.prototype.toLocaleString()
    9. Object.prototype.toSource()
    10. Object.prototype.toString()
    11. Object.prototype.valueOf()
    12. Object.setPrototypeOf()