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+---
+title: 'get RegExp[@@species]'
+slug: Web/JavaScript/Reference/Global_Objects/RegExp/@@species
+translation_of: Web/JavaScript/Reference/Global_Objects/RegExp/@@species
+---
+<div>{{JSRef}}</div>
+
+<p><code><strong>RegExp[@@species]</strong></code> 访问器属性返回<code>RegExp</code> 的构造器。</p>
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox">RegExp[Symbol.species]
+</pre>
+
+<h2 id="描述">描述</h2>
+
+<p><code>species</code> 访问器属性返回 <code>RegExp</code> 对象的默认构造器。子类构造器可能会覆盖它,来修改构造器的指派。</p>
+
+<h2 id="示例">示例</h2>
+
+<p><code>species</code>属性返回默认构造器函数,它是用于<code>RegExp</code> 对象的<code>RegExp</code>构造器:</p>
+
+<pre class="brush: js">RegExp[Symbol.species]; // 函数 RegExp()</pre>
+
+<p>在派生的正则类(也就是你自定义的正则类 <code>MyRegExp</code>)中,<code>MyRegExp</code> 的 species 是 <code>MyRegExp</code> 构造器。但是,你可能希望覆盖它,以便在你的派生类方法中,返回 <code>RegExp</code> 父类对象:</p>
+
+<pre class="brush: js">class MyRegExp extends RegExp {
+ // 将 MyRegExp species 覆盖为 RegExp 父类构造器
+ static get [Symbol.species]() { return RegExp; }
+}</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-regexp-@@species', 'get RegExp [ @@species ]')}}</td>
+ <td>{{Spec2('ES6')}}</td>
+ <td>初始定义。</td>
+ </tr>
+ <tr>
+ <td>{{SpecName('ESDraft', '#sec-get-regexp-@@species', 'get RegExp [ @@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>{{CompatibilityTable}}</div>
+
+<div id="compat-desktop">
+<table class="compat-table">
+ <tbody>
+ <tr>
+ <th>Feature</th>
+ <th>Chrome</th>
+ <th>Firefox (Gecko)</th>
+ <th>Internet Explorer</th>
+ <th>Opera</th>
+ <th>Safari</th>
+ </tr>
+ <tr>
+ <td>Basic support</td>
+ <td>{{CompatUnknown}}</td>
+ <td>{{CompatGeckoDesktop("49")}}</td>
+ <td>{{CompatUnknown}}</td>
+ <td>{{CompatUnknown}}</td>
+ <td>{{CompatUnknown}}</td>
+ </tr>
+ </tbody>
+</table>
+</div>
+
+<div id="compat-mobile">
+<table class="compat-table">
+ <tbody>
+ <tr>
+ <th>Feature</th>
+ <th>Android</th>
+ <th>Chrome for Android</th>
+ <th>Firefox Mobile (Gecko)</th>
+ <th>IE Mobile</th>
+ <th>Opera Mobile</th>
+ <th>Safari Mobile</th>
+ </tr>
+ <tr>
+ <td>Basic support</td>
+ <td>{{CompatUnknown}}</td>
+ <td>{{CompatUnknown}}</td>
+ <td>{{CompatGeckoMobile("49")}}</td>
+ <td>{{CompatUnknown}}</td>
+ <td>{{CompatUnknown}}</td>
+ <td>{{CompatUnknown}}</td>
+ </tr>
+ </tbody>
+</table>
+</div>
+
+<h2 id="另见">另见</h2>
+
+<ul>
+ <li>{{jsxref("RegExp")}}</li>
+ <li>{{jsxref("Symbol.species")}}</li>
+</ul>