VTTRegion: viewportAnchorX property
Limited availability
This feature is not Baseline because it does not work in some of the most widely-used browsers.
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The viewportAnchorX property of the VTTRegion interface represents the x-coordinate of the viewport anchor, as a percentage of the video's width.
Value
A number, in the range 0 to 100 inclusive, representing the x-coordinate of the viewport anchor as a percentage of the video's width. The default is 0.
Exceptions
IndexSizeErrorDOMException-
Thrown when set to a value that is negative or greater than
100.
Examples
In the following example, a new VTTRegion is created, then the value of viewportAnchorX is set to 25. The value is then printed to the console.
js
const region = new VTTRegion();
region.viewportAnchorX = 25; // Place the region 25% from the left edge of the video
console.log(region.viewportAnchorX);
Specifications
| Specification |
|---|
| WebVTT: The Web Video Text Tracks Format # dom-vttregion-viewportanchorx |