From 33058f2b292b3a581333bdfb21b8f671898c5060 Mon Sep 17 00:00:00 2001
From: Peter Bengtsson <mail@peterbe.com>
Date: Tue, 8 Dec 2020 14:40:17 -0500
Subject: initial commit

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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>
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