TextTrackList: change event

Baseline

Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since October 2018.

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The change event is fired when a text track is made active or inactive, or a TextTrackList is otherwise changed.

Syntax

Use the event name in addEventListener():

addEventListener("change", (event) => { })

Alternatively, assign to the event handler property of the interface:

onchange = (event) => { }

Event type

A generic Event with no added properties.

Examples

Using addEventListener():

const mediaElement = document.querySelectorAll("video, audio")[0];
mediaElement.textTracks.addEventListener("change", (event) => {
  console.log(`'${event.type}' event fired`);
});

Using the onchange event handler property (but note that this replaces other event listeners added using onchange, if any):

const mediaElement = document.querySelector("video, audio");
mediaElement.textTracks.onchange = (event) => {
  console.log(`'${event.type}' event fired`);
};