HTMLTrackElement: cuechange event

Use the event name in methods like addEventListener(), or set an event handler property.

addEventListener('cuechange', event => { })

oncuechange = event => { }

A generic Event with no added properties.

The underlying TextTrack, indicated by the track property, receives a cuechange event every time the currently-presented cue is changed. This happens even if the track isn't associated with a media element.

If the track is associated with a media element, using the <track> element as a child of the <audio> or <video> element, the cuechange event is also sent to the HTMLTrackElement.

let textTrackElem = document.getElementById("texttrack");

textTrackElem.addEventListener("cuechange", event => {
  let cues = event.target.track.activeCues;
});

Alternatively, you can use the oncuechange event handler:

let textTrackElem = document.getElementById("texttrack");

textTrackElem.oncuechange = event => {
  let cues = event.target.track.activeCues;
});

• WebVTT
• The same event on TextTrack: cuechange