BadgingThe navigator.setAppBadge() method allows installed web applications to display an application badge, typically a dot or number shown alongside the application's icon on the device's home screen or application dock.limitedhttps://w3c.github.io/badging/https://developer.mozilla.org/docs/Web/API/Navigator/setAppBadgeapi.Navigator.clearAppBadgeapi.Navigator.setAppBadgehttps://nowyoucanuse.com/features--badging.html