CaptureController: CaptureController() constructor

Limited availabilitySecure context

The CaptureController constructor creates a new CaptureController object instance.

Syntax

CaptureController()

Parameters

None.

Examples

// Create a new CaptureController instance
const controller = new CaptureController();

// Prompt the user to share a tab, window, or screen.
const stream = await navigator.mediaDevices.getDisplayMedia({ controller });

// Query the displaySurface value of the captured video track
const [track] = stream.getVideoTracks();
const displaySurface = track.getSettings().displaySurface;

if (displaySurface === "browser") {
  // Focus the captured tab.
  controller.setFocusBehavior("focus-captured-surface");
} else if (displaySurface === "window") {
  // Do not move focus to the captured window.
  // Keep the capturing page focused.
  controller.setFocusBehavior("no-focus-change");
}

Specifications

Browser compatibility

See also

• Screen Capture API
• getDisplayMedia()
• Better screen sharing with Conditional Focus