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---
title: BroadcastChannel()
slug: Web/API/BroadcastChannel/BroadcastChannel
translation_of: Web/API/BroadcastChannel/BroadcastChannel
---
<p>{{APIRef("BroadCastChannel API")}}</p>
<p><code><strong>BroadcastChannel()</strong></code> 构建函数用于创建一个 {{domxref("BroadcastChannel")}} 对象，并与对应的频道相关联。</p>
<p>{{AvailableInWorkers}}</p>
<h2 id="语法">语法</h2>
<pre class="syntaxbox"> <em>channel</em> = new BroadcastChannel(<em>channel</em>);</pre>
<h3 id="值">值</h3>
<dl>
<dt><em>channel</em></dt>
<dd>频道名称，类型为 {{domxref("DOMString")}}；在相同的 {{glossary("origin", "源")}} 下，一个名称只对应一个频道，所有 {{glossary("browsing context", "浏览器上下文")}} 共用。 </dd>
</dl>
<h2 id="示例">示例</h2>
<pre class="brush: js">// create a new channel listening to the "internal_notification" channel.
var bc = new BroadcastChannel('internal_notification');
bc.postMessage('New listening connected!');
</pre>
<h2 id="规范">规范</h2>
<table class="standard-table">
<tbody>
<tr>
<th scope="col">规范</th>
<th scope="col">示例</th>
<th scope="col">备注</th>
</tr>
<tr>
<td>{{SpecName('HTML WHATWG', "comms.html#dom-broadcastchannel", "BroadcastChannel()")}}</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.BroadcastChannel")}}</p>
<h2 id="另见">另见</h2>
<ul>
<li>所属接口：{{domxref("BroadcastChannel")}}</li>
</ul>
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