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authorPeter Bengtsson <mail@peterbe.com>2020-12-08 14:40:17 -0500
committerPeter Bengtsson <mail@peterbe.com>2020-12-08 14:40:17 -0500
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+---
+title: 'get Set[@@species]'
+slug: Web/JavaScript/Reference/Global_Objects/Set/@@species
+tags:
+ - ECMAScript2015
+ - JavaScript
+ - set
+translation_of: Web/JavaScript/Reference/Global_Objects/Set/@@species
+---
+<div>{{JSRef}}</div>
+
+<p><code><strong>Set[@@species]</strong></code> 访问器属性返回<code>Set</code>的构造函数.</p>
+
+<h2 id="描述">描述</h2>
+
+<p>species 访问属性返回 <code>Set</code> 对象的默认构造函数. 子构造函数或许会重载这个属性以至改变构造函数的赋值.</p>
+
+<h2 id="示例">示例</h2>
+
+<h3 id="普通对象中的_Species">普通对象中的 Species</h3>
+
+<p>species 属性返回默认的构造函数, 它是<code>Set</code> 对象的构造函数:</p>
+
+<pre class="brush: js notranslate">Set[Symbol.species]; // function Set()</pre>
+
+<h3 id="派生对象中的_Species">派生对象中的 Species</h3>
+
+<p>在一个派生集合对象中 (比如你自定义的<code>MySet</code>集合),  <code>MySet</code> 的species 属性 是 <code>MySet</code> 构造函数. 又或者, 你想要重写它, 让它能在你派生的类方法中能返回父级<code>Set</code> 对象:</p>
+
+<pre class="brush: js notranslate">class MySet extends Set {
+ // Overwrite MySet species to the parent Set constructor
+ static get [Symbol.species]() { return Set; }
+}</pre>
+
+<h2 id="规范">规范</h2>
+
+<table class="standard-table">
+ <tbody>
+ <tr>
+ <th scope="col">Specification</th>
+ </tr>
+ <tr>
+ <td>{{SpecName('ESDraft', '#sec-get-set-@@species', 'get Set [ @@species ]')}}</td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容性">浏览器兼容性</h2>
+
+<div>
+
+
+<p>{{Compat("javascript.builtins.Set.@@species")}}</p>
+</div>
+
+<h2 id="另见">另见</h2>
+
+<ul>
+ <li>{{jsxref("Set")}}</li>
+ <li>{{jsxref("Symbol.species")}}</li>
+</ul>