The getCueAsHTML() method of the VTTCue interface returns a DocumentFragment containing the cue content.
getCueAsHTML()None.
In the following example a new VTTCue is created. The value as a document fragment is then printed to the console.
let video = document.querySelector("video");
let track = video.addTextTrack("captions", "Captions", "en");
track.mode = "showing";
let cue = new VTTCue(0, 0.9, "Hildy!");
console.log(cue.getCueAsHTML());
track.addCue(cue);