The addtrack
event is fired when a track is added to a TextTrackList
.
TextTrackList: addtrack event
Syntax
Use the event name in methods like addEventListener()
, or set an event handler property.
addEventListener('addtrack', event => { }) onaddtrack = event => { }
Event type
An TrackEvent
. Inherits from Event
.
Event properties
In addition to the properties listed below, properties from the parent interface, Event
, are available.
Examples
Using addEventListener()
:
const mediaElement = document.querySelector('video, audio'); mediaElement.textTracks.addEventListener('addtrack', event => { console.log(`Text track: ${event.track.label} added`); });
Using the onaddtrack
event handler property:
const mediaElement = document.querySelector('video, audio'); mediaElement.textTracks.onaddtrack = event => { console.log(`Text track: ${event.track.label} added`); };
Specifications
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 | |
addtrack_event |
23
|
12
|
31
|
11
|
≤12.1
|
6
|
4.4
|
25
|
31
|
≤12.1
|
7
|
1.5
|
See also
- Related events:
removetrack
,change
- This event on
VideoTrackList
targets:addtrack
- This event on
AudioTrackList
targets:addtrack
- This event on
MediaStream
targets:addtrack
- Media Streams API
- WebRTC
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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/TextTrackList/addtrack_event