The TrackEvent()
constructor creates and returns a new TrackEvent
object describing an event which occurred on a list of tracks (AudioTrackList
, VideoTrackList
, or TextTrackList
).
TrackEvent()
Syntax
new TrackEvent(type, eventInfo);
Parameters
-
type
-
The type of track event which is described by the object:
"addtrack"
or"removetrack"
. -
eventInfo
Optional -
An optional dictionary providing additional information configuring the new event; it can contain the following fields in any combination:
-
track
Optional -
The track to which the event refers; this is
null
by default, but should be set to aVideoTrack
,AudioTrack
, orTextTrack
as appropriate given the type of track. -
bubbles
Optional -
A Boolean indicating whether the event bubbles or not.
-
cancelable
Optional -
A Boolean indicating whether or not the event can be canceled.
-
composed
Optional -
A Boolean indicating whether or not the event will trigger listeners outside of a shadow root; see
Event.composed
for more details.
-
Return value
A newly-created TrackEvent
object, initialized as described by the inputs to the constructor.
Specifications
Specification |
---|
HTML Standard # the-trackevent-interface |
Browser compatibility
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
TrackEvent |
23
|
14
|
27
|
No
|
15
|
6
|
4.4
|
25
|
27
|
14
|
7
|
1.5
|
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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/TrackEvent/TrackEvent