HTMLMediaElement.videoTracks

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只读 videoTracks property on HTMLMediaElement objects returns a VideoTrackList object listing all of the VideoTrack objects representing the media element's video tracks.

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 video tracks are added or existing ones removed. See Event handlers in VideoTrackList to learn more about watching for changes to a media element's track list.

句法

var videoTracks = mediaElement.videoTracks;

值

A VideoTrackList object representing the list of video 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 VideoTrack object which provides information about the track.

规范

规范	状态	注释
HTML 实时标准 The definition of 'HTMLMediaElement.videoTracks' in that specification.	实时标准	无变化自 HTML5

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

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完整支持
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用户必须明确启用此特征。

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The interface defining it, HTMLMediaElement .
<video>
VideoTrack and VideoTrackList

元数据

最后修改： Mar 18, 2019

在此页

句法

值

规范

浏览器兼容性

图例

另请参阅

相关话题