The align property of the VTTCue interface represents the alignment of all of the lines of text in the text box.
A string containing one of the following values:
"start"Start alignment.
"center"Center alignment.
"end"End alignment.
"left"Left alignment.
"right"Right alignment.
In the following example a new VTTCue is created, then the value of align is set to "start". The value 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!");
cue.align = "start";
console.log(cue.align);
track.addCue(cue);