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---
title: 'get ArrayBuffer[@@species]'
slug: Web/JavaScript/Reference/Global_Objects/ArrayBuffer/@@species
tags:
- ArrayBuffer
- JavaScript
- TypedArrays
- 属性
translation_of: Web/JavaScript/Reference/Global_Objects/ArrayBuffer/@@species
---
<div>{{JSRef}}</div>
<p>该 <code><strong>ArrayBuffer[@@species]</strong></code> 访问器属性会返回 <code>ArrayBuffer</code> 构造器。</p>
<h2 id="语法">语法</h2>
<pre class="syntaxbox">ArrayBuffer[Symbol.species]
</pre>
<h2 id="描述">描述</h2>
<p>这个 species 访问器属性会返回默认的 <code>ArrayBuffer</code> 构造器。子类构造器可能会覆盖它以改变构造器赋值。</p>
<h2 id="示例">示例</h2>
<p>返回默认的 <code>ArrayBuffer</code> 构造器：</p>
<pre class="brush: js">ArrayBuffer[Symbol.species]; // function ArrayBuffer()</pre>
<p>在派生集合对象中（比如你定制的 array buffer <code>MyArrayBuffer</code>），<code>MyArrayBuffer</code> species 就是 <code>MyArrayBuffer</code> 构造器。但是，你可能想要在派生类里重写它，以期返回的是父类的 <code>ArrayBuffer</code> 对象：</p>
<pre class="brush: js">class MyArrayBuffer extends ArrayBuffer {
// Overwrite MyArrayBuffer species to the parent ArrayBuffer constructor
static get [Symbol.species]() { return ArrayBuffer; }
}</pre>
<h2 id="规范">规范</h2>
<table class="standard-table">
<tbody>
<tr>
<th scope="col">Specification</th>
<th scope="col">Status</th>
<th scope="col">Comment</th>
</tr>
<tr>
<td>{{SpecName('ES6', '#sec-get-arraybuffer-@@species', 'get ArrayBuffer [ @@species ]')}}</td>
<td>{{Spec2('ES6')}}</td>
<td>Initial definition.</td>
</tr>
<tr>
<td>{{SpecName('ESDraft', '#sec-get-arraybuffer-@@species', 'get ArrayBuffer [ @@species ]')}}</td>
<td>{{Spec2('ESDraft')}}</td>
<td> </td>
</tr>
</tbody>
</table>
<h2 id="浏览器支持">浏览器支持</h2>
<p>{{Compat("javascript.builtins.ArrayBuffer.@@species")}}</p>
<h2 id="相关">相关</h2>
<ul>
<li>{{jsxref("ArrayBuffer")}}</li>
<li>{{jsxref("Symbol.species")}}</li>
</ul>
|
