在此页

• 描述
• 范例
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

ArrayBuffer[@@species] accessor property returns the ArrayBuffer 构造函数。

描述

The species accessor property returns the default constructor for ArrayBuffer objects. Subclass constructors may over-ride it to change the constructor assignment.

范例

Species in ordinary objects

The species property returns the default constructor function, which is the ArrayBuffer constructor for ArrayBuffer 对象：

ArrayBuffer[Symbol.species]; // function ArrayBuffer()
					

Species in derived objects

In a derived collection object (e.g. your custom array buffer MyArrayBuffer ), the MyArrayBuffer species is the MyArrayBuffer constructor. However, you might want to overwrite this, in order to return parent ArrayBuffer objects in your derived class methods:

class MyArrayBuffer extends ArrayBuffer {
  // Overwrite MyArrayBuffer species to the parent ArrayBuffer constructor
  static get [Symbol.species]() { return ArrayBuffer; }
}
					

规范

规范
ECMAScript (ECMA-262) The definition of 'get ArrayBuffer [ @@species ]' 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
@@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

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

• ArrayBuffer
• Symbol.species

元数据

• 最后修改： May 21, 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()