HTMLMediaElement.videoTracks - Web APIs 编辑

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The read-only 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.

Syntax

var videoTracks = mediaElement.videoTracks;

Value

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() method.

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

Specifications

Browser compatibility

BCD tables only load in the browser

See also

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