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 Array[@@species]'
+slug: Web/JavaScript/Reference/Global_Objects/Array/@@species
+tags:
+  - JavaScript
+  - 原型
+  - 数组
+  - 方法
+translation_of: Web/JavaScript/Reference/Global_Objects/Array/@@species
+---
+<div>{{JSRef}}</div>
+
+<p><code><strong>Array[@@species]</strong></code> 访问器属性返回 <code>Array</code> 的构造函数。</p>
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox">Array[Symbol.species]
+</pre>
+
+<h3 id="返回值">返回值</h3>
+
+<p>{{jsxref("Array")}} 的构造函数。</p>
+
+<h2 id="描述">描述</h2>
+
+<p><code>species</code> 访问器属性返回 <code>Array</code> 对象的默认构造函数。子类的构造函数可能会覆盖并改变构造函数的赋值。</p>
+
+<h2 id="示例">示例</h2>
+
+<p><code>species</code> 属性返回默认构造函数, 它用于 <code>Array</code> 对象的构造函数 <code>Array</code>:</p>
+
+<pre class="brush: js">Array[Symbol.species]; // function Array()</pre>
+
+<p>在继承类的对象中（例如你自定义的数组 <code>MyArray</code>），<code>MyArray</code> 的 <code>species</code> 属性返回的是 <code>MyArray</code> 这个构造函数. 然而你可能想要覆盖它，以便在你继承的对象 <code>MyArray</code> 中返回父类的构造函数 <code>Array</code> :</p>
+
+<pre class="brush: js">class MyArray extends Array {
+  // 重写 MyArray 的 species 属性到父类 Array 的构造函数
+  static get [Symbol.species]() { return Array; }
+}</pre>
+
+<h2 id="规范">规范</h2>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th scope="col">规范</th>
+   <th scope="col">状态</th>
+   <th scope="col">备注</th>
+  </tr>
+  <tr>
+   <td>{{SpecName('ES6', '#sec-get-array-@@species', 'get Array [ @@species ]')}}</td>
+   <td>{{Spec2('ES6')}}</td>
+   <td>Initial definition.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-get-array-@@species', 'get Array [ @@species ]')}}</td>
+   <td>{{Spec2('ESDraft')}}</td>
+   <td></td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容性">浏览器兼容性</h2>
+
+<div>
+<div>
+
+
+<p>{{Compat("javascript.builtins.Array.@@species")}}</p>
+</div>
+</div>
+
+<h2 id="参见">参见</h2>
+
+<ul>
+ <li>{{jsxref("Array")}}</li>
+ <li>{{jsxref("Symbol.species")}}</li>
+</ul>
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