The change
event is fired when a video track is made active or inactive, for example by changing the track's selected
property.
VideoTrackList: change event
Syntax
Use the event name in methods like addEventListener()
, or set an event handler property.
addEventListener('change', event => { }) onchange = event => { }
Event type
A generic Event
with no added properties.
Examples
Using addEventListener()
:
const videoElement = document.querySelector('video'); videoElement.videoTracks.addEventListener('change', (event) => { console.log(`'${event.type}' event fired`); }); // changing the value of `selected` will trigger the `change` event const toggleTrackButton = document.querySelector('.toggle-track'); toggleTrackButton.addEventListener('click', () => { const track = videoElement.videoTracks[0]; track.selected = !track.selected; });
Using the onchange
event handler property:
const videoElement = document.querySelector('video'); videoElement.videoTracks.onchange = (event) => { console.log(`'${event.type}' event fired`); }; // changing the value of `selected` will trigger the `change` event const toggleTrackButton = document.querySelector('.toggle-track'); toggleTrackButton.addEventListener('click', () => { const track = videoElement.videoTracks[0]; track.selected = !track.selected; });
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 | |
change_event |
37
|
79
12-79
|
33
|
10
|
24
|
7
|
No
|
37
|
No
|
24
|
7
|
No
|
See also
- Related events:
addtrack
,removetrack
- This event on
AudioTrackList
targets:change
- 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/VideoTrackList/change_event