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---
title: Navigator.mediaDevices
slug: Web/API/Navigator/mediaDevices
tags:
- Media
- Media Capture and Streams API
- Media Streams API
- MediaDevices
- Navigator
- Reference
- Web
- 只读
- 属性
translation_of: Web/API/Navigator/mediaDevices
---
<div>{{APIRef("Media Capture and Streams")}}</div>
<div> </div>
<div>mediaDevices 是 Navigator 只读属性，返回一个 {{domxref("MediaDevices")}} 对象，该对象可提供对相机和麦克风等媒体输入设备的连接访问，也包括屏幕共享。</div>
<h2 id="语法">语法</h2>
<pre class="syntaxbox">var <em>mediaDevices</em> = navigator.mediaDevices;
</pre>
<h3 id="返回值"> 返回值</h3>
<p>{{domxref("MediaDevices")}} 是一个单例对象。通常，您只需直接使用此对象的成员，例如通过调用{{domxref("navigator.mediaDevices.getUserMedia()")}}。</p>
<h2 id="特性">特性</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('Media Capture', '#widl-NavigatorUserMedia-mediaDevices', 'NavigatorUserMedia.mediaDevices')}}</td>
<td>{{Spec2('Media Capture')}}</td>
<td>Initial definition.</td>
</tr>
</tbody>
</table>
<h2 id="浏览器兼容">浏览器兼容</h2>
{{Compat("api.Navigator.mediaDevices")}}
<h2 id="参考阅读">参考阅读</h2>
<ul>
<li><a href="/en-US/docs/Web/API/Media_Streams_API">Media Capture and Streams API</a>: The entry point to the documentation about the entire media stream API.</li>
<li><a href="/en-US/docs/Web/API/WebRTC_API">WebRTC API</a>: Documentation about the WebRTC API, which is closely related.</li>
</ul>
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