Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The BrowserCaptureMediaStreamTrack interface of the Screen Capture API represents a single video track. It extends the MediaStreamTrack class with methods to limit the part of a self-capture stream (for example, a user's screen or window) that is captured.
clone() Returns an uncropped, unrestricted clone of the original BrowserCaptureMediaStreamTrack.
cropTo() Crops a self-capture stream to the area in which a specified DOM element is rendered.
restrictTo() Restricts a self-capture stream to a specific DOM element.
See Using the Element Capture and Region Capture APIs for in-context example code.