HTMLMediaElement.audioTracks

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只读 audioTracks property on HTMLMediaElement objects returns an AudioTrackList object listing all of the AudioTrack objects representing the media element's audio tracks. The media element may be either an <audio> element or a <video> 元素。

The returned list is live ; that is, as tracks are added to and removed from the media element, the list's contents change dynamically. Once you have a reference to the list, you can monitor it for changes to detect when new audio tracks are added or existing ones removed. See 事件处理程序 in AudioTrackList to learn more about watching for changes to a media element's track list.

句法

var audioTracks = mediaElement.audioTracks;

值

A AudioTrackList object representing the list of audio tracks included in the media element. The list of tracks can be accessed using array notation, or using the object's getTrackById() 方法。

Each track is represented by a AudioTrack object which provides information about the track.

范例

In this example, all of the audio tracks on a given element are muted.

HTML

The HTML establishes the element itself.

<video id="video" src="somevideo.mp4"></video>

JavaScript

The JavaScript code handles muting the video element's audio tracks.

var video = document.getElementById("video");
for (var i = 0; i < video.audioTracks.length; i += 1) {
  video.audioTracks[i].enabled = false;
}

规范

规范	状态	注释
HTML 实时标准 The definition of 'HTMLMediaElement.audioTracks' in that specification.	实时标准	无变化自 HTML5
HTML5 The definition of 'HTMLMediaElement.audioTracks' in that specification.	推荐	初始定义。

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
`audioTracks`	Chrome No	Edge 12 — 79	Firefox 33	IE ?	Opera Yes	Safari Yes	WebView Android No	Chrome Android No	Firefox Android 33	Opera Android Yes	Safari iOS Yes	Samsung Internet Android No

图例

完整支持
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兼容性未知 ?
用户必须明确启用此特征。

另请参阅

The interface defining it, HTMLMediaElement .
<audio> and <video>
AudioTrack and AudioTrackList

元数据

最后修改： 2019 年 3 月 23 日

在此页

句法

值

范例

HTML

JavaScript

规范

浏览器兼容性

图例

另请参阅

相关话题