AudioTrackList: change event
The change
event is fired when an audio track is enabled or disabled, for example by changing the track's enabled
property.
This event is not cancelable and does not bubble.
Syntax
Use the event name in methods like addEventListener()
, or set an event handler property.
js
addEventListener("change", (event) => { })
onchange = (event) => { }
Event type
A generic Event
.
Examples
Using addEventListener()
:
js
const videoElement = document.querySelector("video");
videoElement.audioTracks.addEventListener("change", (event) => {
console.log(`'${event.type}' event fired`);
});
// changing the value of `enabled` will trigger the `change` event
const toggleTrackButton = document.querySelector(".toggle-track");
toggleTrackButton.addEventListener("click", () => {
const track = videoElement.audioTracks[0];
track.enabled = !track.enabled;
});
Using the onchange
event handler property:
js
const videoElement = document.querySelector("video");
videoElement.audioTracks.onchange = (event) => {
console.log(`'${event.type}' event fired`);
};
// changing the value of `enabled` will trigger the `change` event
const toggleTrackButton = document.querySelector(".toggle-track");
toggleTrackButton.addEventListener("click", () => {
const track = videoElement.audioTracks[0];
track.enabled = !track.enabled;
});
Specifications
Specification |
---|
HTML Standard # event-media-change |
HTML Standard # handler-tracklist-onchange |
Browser compatibility
BCD tables only load in the browser
See also
- Related events:
addtrack
,removetrack
- This event on
VideoTrackList
targets:change
- Media Capture and Streams API
- WebRTC API