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• 范例
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

unmute event is sent to a MediaStreamTrack when the track's source is once again able to provide media data after a period of not being able to do so. This ends the muted state that began with the mute 事件。

冒泡	No
可取消	No
接口	事件
事件处理程序特性	onunmute

注意： The condition that most people think of as "muted" (that is, a user-controllable way to silence a track) is actually managed using the MediaStreamTrack.enabled property, for which there are no events.

范例

In this example, event handlers are established for the mute and unmute events in order to detect when the media is not flowing from the source for the MediaStreamTrack stored in the variable musicTrack .

musicTrack.addEventListener("mute", event => {
  document.getElementById("timeline-widget").style.backgroundColor = "#aaa";
}, false);
musicTrack.addEventListener("unmute", event => {
 document.getElementById("timeline-widget").style.backgroundColor = "#fff";
}, false);
					

With these event handlers in place, when the track musicTrack enters its muted state, the element with the ID timeline-widget gets its background color changed to #aaa . When the track exits the muted state—detected by the arrival of an unmuted event—the background color is restored to white.

还可以使用 onunmute event handler property to set up a handler for this event; similarly, the onmute event handler is available for setting up a handler for the mute event. The following example shows this:

musicTrack.onmute = event => {
  document.getElementById("timeline-widget").style.backgroundColor = "#aaa";
}
musicTrack.mute = event = > {
  document.getElementById("timeline-widget").style.backgroundColor = "#fff";
}
					

规范

规范	状态	注释
媒体捕获和流 The definition of 'unmute' in that specification.	候选推荐	最初的规范。

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
unmute event	Chrome Yes	Edge 12	Firefox 59	IE No	Opera Yes	Safari Yes	WebView Android Yes	Chrome Android Yes	Firefox Android 59	Opera Android Yes	Safari iOS Yes	Samsung Internet Android Yes

图例

完整支持

完整支持

不支持

不支持

另请参阅

• onunmute event handler property
• mute event

元数据

• 最后修改： Feb 28, 2020

相关话题

1. Media Streams API
2. MediaStreamTrack
3. 特性

   1. enabled
   2. id
   3. kind
   4. label
   5. muted
   6. onended
   7. onmute
   8. onoverconstrained
   9. onunmute
   10. readyState
   11. remote
4. 方法

   1. applyConstraints()
   2. clone()
   3. getCapabilities()
   4. getConstraints()
   5. getSettings()
   6. stop()
5. 事件

   1. ended
   2. mute
   3. unmute
6. Related pages for Media Capture and Streams

   1. AudioStreamTrack
   2. BlobEvent
   3. CanvasCaptureMediaStream
   4. ConstrainBoolean
   5. ConstrainDOMString
   6. ConstrainDouble
   7. ConstrainLong
   8. DoubleRange
   9. HTMLCanvasElement.captureStream()
   10. LongRange
   11. MediaDevices
   12. MediaStream
   13. MediaStreamTrackEvent
   14. MediaTrackCapabilities
   15. MediaTrackConstraints
   16. MediaTrackSettings
   17. MediaTrackSupportedConstraints
   18. Navigator.mediaDevices
   19. NavigatorUserMedia
   20. NavigatorUserMediaError
   21. VideoStreamTrack
   22. navigator.mediaDevices.getUserMedia()