Docs4dev
Docs
dom / latest / windowcontrolsoverlay.html

WindowControlsOverlay

Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The WindowControlsOverlay interface of the Window Controls Overlay API exposes information about the geometry of the title bar area in desktop Progressive Web Apps, and an event to know whenever it changes. This interface is accessible from Navigator.windowControlsOverlay.

EventTarget WindowControlsOverlay

Instance properties

WindowControlsOverlay.visible Read only

A Boolean that indicates whether the window controls overlay is visible or not.

Instance methods

WindowControlsOverlay.getTitlebarAreaRect()

Returns the size and position of the title bar.

Events

Listen to these events using EventTarget.addEventListener() or by assigning an event listener to the relevant oneventname property of this interface.

geometrychange

Fired when the geometry of the title bar area changes.

Examples

js

if ("windowControlsOverlay" in navigator) {
  navigator.windowControlsOverlay.addEventListener(
    "geometrychange",
    (event) => {
      if (event.visible) {
        const rect = event.titlebarAreaRect;
        // Do something with the coordinates of the title bar area.
      }
    },
  );
}

Specifications

Specification
Window Controls Overlay
# windowcontrolsoverlay-interface

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
WindowControlsOverlay 105 105 No No 91 No No No No No No No
geometrychange_event 105 105 No No 91 No No No No No No No
getTitlebarAreaRect 105 105 No No 91 No No No No No No No
visible 105 105 No No 91 No No No No No No No

© 2005–2023 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/WindowControlsOverlay