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---
title: HTMLMediaElement.autoplay
slug: Web/API/HTMLMediaElement/autoplay
translation_of: Web/API/HTMLMediaElement/autoplay
---
<div>{{APIRef("HTML DOM")}}</div>
<p><strong><code>HTMLMediaElement.autoplay</code></strong> 属性等同于HTML属性中的 {{htmlattrxref("autoplay", "video")}}, 它表示当player下载到足够可以播放的媒体文件时，是否自动播放视频。</p>
<p><span style='background-color: #fafbfc; font-family: Consolas,Monaco,"Andale Mono",monospace; font-size: 1rem; white-space: pre;'>注意: 一些版本的Chrome只支持</span><strong style='font-family: Consolas,Monaco,"Andale Mono",monospace; font-size: 1rem; white-space: pre;'><code>autostart</code></strong><span style='background-color: #fafbfc; font-family: Consolas,Monaco,"Andale Mono",monospace; font-size: 1rem; white-space: pre;'>, 不支持</span><strong style='font-family: Consolas,Monaco,"Andale Mono",monospace; font-size: 1rem; white-space: pre;'><code>autoplay</code></strong></p>
<h2 id="Syntax" name="Syntax">语法</h2>
<pre class="syntaxbox">...</pre>
<h3 id="参数类型">参数类型</h3>
<p>{{domxref("Boolean")}}</p>
<h2 id="用例">用例</h2>
<p>...</p>
<pre class="brush: html"><...></...>
</pre>
<p>...</p>
<pre class="brush: js">Xxx.xxx()
</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', "the-video-element.html#htmlmediaelement", "HTMLMediaElement.autoplay")}}</td>
<td>{{Spec2('HTML WHATWG')}}</td>
<td>No change from {{SpecName('HTML5 W3C')}}</td>
</tr>
<tr>
<td>{{SpecName('HTML5 W3C', "embedded-content-0.html#htmlmediaelement", "HTMLMediaElement.autoplay")}}</td>
<td>{{Spec2('HTML5 W3C')}}</td>
<td>Initial definition.</td>
</tr>
</tbody>
</table>
<h2 id="浏览器支持">浏览器支持</h2>
{{Compat("api.HTMLMediaElement.autoplay")}}
<h2 id="See_Also" name="See_Also">看看这里</h2>
<ul>
<li>接口定义： {{domxref("HTMLMediaElement")}}.</li>
</ul>
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