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感谢您的访问。此页面目前仅提供英语版本。我们正在开发中文版本。谢谢您的理解。

VideoTrackList

For additional information, see https://html.spec.whatwg.org/multipage/media.html#videotracklist.

Extends

Properties

length

readonly length: number

For additional information, see https://html.spec.whatwg.org/multipage/media.html#dom-videotracklist-length.


selectedIndex

readonly selectedIndex: number

For additional information, see https://html.spec.whatwg.org/multipage/media.html#dom-videotracklist-selectedindex.


onchange?

optional onchange: EventListener

For additional information, see https://html.spec.whatwg.org/multipage/media.html#handler-tracklist-onchange.


onaddtrack?

optional onaddtrack: EventListener

For additional information, see https://html.spec.whatwg.org/multipage/media.html#handler-tracklist-onaddtrack.


onremovetrack?

optional onremovetrack: EventListener

For additional information, see https://html.spec.whatwg.org/multipage/media.html#handler-tracklist-onremovetrack.

Methods

getTrackById()

getTrackById(id: string): VideoTrack | undefined

For additional information, see https://html.spec.whatwg.org/multipage/media.html#dom-videotracklist-gettrackbyid.

Parameters

id

string

Returns

VideoTrack | undefined


Last updated: Jul 22, 2026