在此页

• 句法
• Compatibility notes
• 范例
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

ArrayBuffer() constructor is used to create ArrayBuffer 对象。

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.

句法

new ArrayBuffer(length)
					

参数

length

The size, in bytes, of the array buffer to create.

返回值

A new ArrayBuffer object of the specified size. Its contents are initialized to 0.

异常

A RangeError is thrown if the length is larger than Number.MAX_SAFE_INTEGER (>= 2 ** 53) or negative.

Compatibility notes

Starting with ECMAScript 2015, ArrayBuffer constructors require to be constructed with a new operator. Calling an ArrayBuffer constructor as a function without new , will throw a TypeError from now on.

var dv = ArrayBuffer(10);
// TypeError: calling a builtin ArrayBuffer constructor
// without new is forbidden
					

var dv = new ArrayBuffer(10);
					

范例

Creating an ArrayBuffer

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

var buffer = new ArrayBuffer(8);
var 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() 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
ArrayBuffer() without new throws	Chrome 7	Edge 14	Firefox 44	IE No	Opera 15	Safari 5.1	WebView Android ≤37	Chrome Android 18	Firefox Android 44	Opera Android 14	Safari iOS 5	Samsung Internet Android 1.0	nodejs 0.12

图例

完整支持

完整支持

不支持

不支持

另请参阅

• JavaScript 类型数组
• SharedArrayBuffer

元数据

• 最后修改： May 20, 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()