RestrictionTarget
Limited availability
This feature is not Baseline because it does not work in some of the most widely-used browsers.
Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The RestrictionTarget interface of the Screen Capture API provides a static method, fromElement(), which returns a RestrictionTarget instance that can be used to restrict a captured video track to a specified DOM element.
Static methods
fromElement()Experimental-
Returns a
RestrictionTargetinstance that can be used to restrict a captured video track to a specified DOM element (plus its descendants).
Examples
js
// Options for getDisplayMedia()
const displayMediaOptions = {
preferCurrentTab: true,
};
// Create restriction target from DOM element
const demoElem = document.querySelector("#demo");
const restrictionTarget = await RestrictionTarget.fromElement(demoElem);
// Capture video stream from user's webcam and isolate video track
const stream =
await navigator.mediaDevices.getDisplayMedia(displayMediaOptions);
const [track] = stream.getVideoTracks();
// Restrict video track
await track.restrictTo(restrictionTarget);
// Broadcast restricted stream in <video> element
videoElem.srcObject = stream;
See Using the Element Capture and Region Capture APIs for in-context example code.
Specifications
| Specification |
|---|
| Element Capture # dom-restrictiontarget |