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+---
+title: BroadcastChannel.close()
+slug: Web/API/BroadcastChannel/close
+translation_of: Web/API/BroadcastChannel/close
+---
+<p>{{APIRef("BroadCastChannel API")}}</p>
+
+<p>通过调用 <strong><code>BroadcastChannel.close()</code></strong> 方法，可以马上断开其与对应频道的关联，并让其被垃圾回收。这是必要的步骤，因为浏览器没有其它方式知道频道不再被需要。</p>
+
+<p>{{AvailableInWorkers}}</p>
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox">var <em>str</em> = <em>channe<code>l</code></em><code>.close();</code>
+</pre>
+
+<h2 id="示例">示例</h2>
+
+<pre class="brush: js">// 连接到指定频道
+var bc = new BroadcastChannel('test_channel');
+
+// 其它操作 (如: postMessage, …)
+
+// 当完成后，断开与频道的连接
+bc.close();
+</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('HTML WHATWG', "comms.html#dom-broadcastchannel-close", "BroadcastChannel.close()")}}</td>
+   <td>{{Spec2('HTML WHATWG')}}</td>
+   <td>Initial definition.</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容性">浏览器兼容性</h2>
+
+
+
+<p>{{Compat("api.BroadcastChannel.close")}}</p>
+
+<h2 id="另见">另见</h2>
+
+<ul>
+ <li>{{domxref("BroadcastChannel")}}, the interface it belongs to.</li>
+</ul>