VTTCue: positionAlign property

The positionAlign property of the VTTCue interface is used to determine what position is anchored to.

Value

A string containing one of the following values:

• "line-left"
  • : Line-left alignment.
• "center"
  • : Center alignment.
• "line-right"
  • : Line-right alignment.
• "auto"
  • : Automatic alignment, which depends on the text alignment of the cue, interpreted as follows:
    • line-left: if the text alignment is left, the cue is using a LTR language and the text alignment is start, or the cue is using a RTL language and the text alignment is end.
    • line-right: if the text alignment is right, the cue is using a RTL language and the text alignment is start, or the cue is using a LTR language and the text-alignment is end.
    • center: if there is no text alignment position set.

Examples

In the following example a new VTTCue is created, then the value of positionAlign is set to "line-right". 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.positionAlign = "line-right";
console.log(cue.positionAlign);

track.addCue(cue);

Specifications

Browser compatibility