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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>
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