Notifications from service workers and installed appsNotifications via service worker registration's showNotification() method, sent from installed web applications (for example, saved to the Home Screen on Safari for iOS), show a message to the user, typically using the notification system of the host operating system.widely2023-03-272025-09-27https://notifications.spec.whatwg.org/#service-worker-apinotificationshttps://nowyoucanuse.com/features--notifications-apps.html