Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The visible read-only property of the WindowControlsOverlayGeometryChangeEvent is a boolean flag that indicates whether the window controls overlay is visible or not in a desktop-installed Progressive Web App.
If the user opts-out of the Window Controls Overlay feature, the default title bar appears and the window controls buttons do not appear as an overlay, in which case the visible flag is false.