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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>
+
+<div>{{CompatibilityTable}}</div>
+
+<div id="compat-desktop">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th>Feature</th>
+   <th>Chrome</th>
+   <th>Edge</th>
+   <th>Firefox (Gecko)</th>
+   <th>Microsoft Edge</th>
+   <th>Internet Explorer</th>
+   <th>Opera</th>
+   <th>Safari (WebKit)</th>
+  </tr>
+  <tr>
+   <td>Basic support</td>
+   <td>{{CompatChrome(51.0)}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatGeckoDesktop("36.0")}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<div id="compat-mobile">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th>Feature</th>
+   <th>Android</th>
+   <th>Android Webview</th>
+   <th>Edge</th>
+   <th>Firefox Mobile (Gecko)</th>
+   <th>Firefox OS</th>
+   <th>IE Mobile</th>
+   <th>Opera Mobile</th>
+   <th>Safari Mobile</th>
+   <th>Chrome for Android</th>
+  </tr>
+  <tr>
+   <td>Basic support</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatGeckoMobile("36.0")}}</td>
+   <td>{{CompatGeckoMobile("36.0")}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<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>