v152 · interactive demo
Badge Permission Lab
Call the real App Badging API and report the notification-permission prerequisite without inferring visual success.
Chrome 152 requires notification permission before an installed macOS PWA badge is shown. setAppBadge() can resolve even when the platform silently declines to display it.
code
if (Notification.permission === 'granted') {
await navigator.setAppBadge(3);
}