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authorPeter Bengtsson <mail@peterbe.com>2020-12-08 14:40:17 -0500
committerPeter Bengtsson <mail@peterbe.com>2020-12-08 14:40:17 -0500
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+---
+title: MediaStreamTrack.readyState
+slug: Web/API/MediaStreamTrack/readyState
+tags:
+ - API
+ - 参考
+ - 只读
+ - 媒体捕获和流
+ - 媒体流追踪
+ - 属性
+translation_of: Web/API/MediaStreamTrack/readyState
+---
+<div>{{APIRef("Media Capture and Streams")}}</div>
+
+<p><strong><code>MediaStreamTrack.readyState</code></strong>只读属性返回一个枚举的值,该值给出了轨道的状态。</p>
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox notranslate">const <em>state</em> = <em>track</em>.readyState</pre>
+
+<h3 id="值">值</h3>
+
+<p>它采用以下值之一:</p>
+
+<ul>
+ <li><code>"live"</code>表示输入已连接,并尽最大努力提供实时数据。 在这种情况下,可以使用{{domxref("MediaStreamTrack.enabled")}}属性打开或关闭数据输出。</li>
+ <li><code>"ended"</code>表示输入不再提供任何数据,也永远不会提供新数据。</li>
+</ul>
+
+<h2 id="Specifications" name="Specifications">技术指标</h2>
+
+<table class="standard-table" style="height: 49px; width: 1000px;">
+ <thead>
+ <tr>
+ <th scope="col">Specification</th>
+ <th scope="col">Status</th>
+ <th scope="col">Comment</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td>{{ SpecName('Media Capture', '#dom-mediastreamtrack-readystate', 'MediaStreamTrack.readyState') }}</td>
+ <td>{{ Spec2('Media Capture') }}</td>
+ <td>Initial specification.</td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容性">浏览器兼容性</h2>
+
+<div class="hidden">此页面上的兼容性表是根据结构化数据生成的。 如果您想贡献数据,请查看https://github.com/mdn/browser-compat-data并向我们发送请求请求。</div>
+
+<p>{{Compat("api.MediaStreamTrack.readyState")}}</p>
+
+<h2 id="看看别的">看看别的</h2>
+
+<ul>
+ <li><a href="/en-US/docs/Web/API/Media_Streams_API">Media Stream API</a></li>
+ <li><a href="/en-US/docs/Web/API/WebRTC_API">WebRTC</a></li>
+ <li>{{domxref("MediaStreamTrack.onended")}}</li>
+</ul>