---
title: WeakSet.prototype.delete()
slug: Web/JavaScript/Reference/Global_Objects/WeakSet/delete
translation_of: Web/JavaScript/Reference/Global_Objects/WeakSet/delete
---
<div>{{JSRef}}</div>

<p><code><strong>delete()</strong></code> 方法从 <code>WeakSet 对象中</code>移除指定的元素。</p>

<h2 id="语法">语法</h2>

<pre class="syntaxbox"><code><em>ws</em>.delete(value);</code></pre>

<h3 id="参数">参数</h3>

<dl>
 <dt>value</dt>
 <dd>必须。从 <code>WeakSet</code> 对象中移除的对象。</dd>
</dl>

<h3 id="返回值">返回值</h3>

<p>如果在 <code>WeakSet</code> 对象中成功移除元素则返回 true。如果 key 没有在 WeakSet 中<font face="Consolas, Liberation Mono, Courier, monospace">找到或者 key 不是一个对象，则返回 false。</font></p>

<h2 id="示例">示例</h2>

<h3 id="使用_delete_方法">使用 <code>delete</code> 方法</h3>

<pre class="brush: js">var ws = new WeakSet();
var obj = {};

ws.add(window);

ws.delete(obj);    // 返回 false。因为找不到要删除的obj
ws.delete(window); // 返回 true。成功地移除了元素

ws.has(window);    // 返回 false。因为 WeakSet 中已经不存在 window 对象
</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-weakset.prototype.delete', 'WeakSet.prototype.delete')}}</td>
   <td>{{Spec2('ES6')}}</td>
   <td>Initial definition.</td>
  </tr>
  <tr>
   <td>{{SpecName('ESDraft', '#sec-weakset.prototype.delete', 'WeakSet.prototype.delete')}}</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>

<p>{{CompatibilityTable}}</p>

<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>36</td>
   <td>{{CompatGeckoDesktop(34)}}</td>
   <td>{{CompatNo}}</td>
   <td>23</td>
   <td>{{CompatNo}}</td>
  </tr>
 </tbody>
</table>
</div>

<div id="compat-mobile">
<table class="compat-table">
 <tbody>
  <tr>
   <th>Feature</th>
   <th>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>{{CompatNo}}</td>
   <td>{{ CompatGeckoMobile(34) }}</td>
   <td>{{CompatNo}}</td>
   <td>{{CompatNo}}</td>
   <td>{{CompatNo}}</td>
  </tr>
 </tbody>
</table>
</div>

<h2 id="相关链接">相关链接</h2>

<ul>
 <li>{{jsxref("WeakSet")}}</li>
 <li>{{jsxref("WeakSet.prototype.clear()")}}</li>
</ul>