Push-notifikationer lader apps notificere brugere selv når appen ikke er åben — til meddelelser, opdateringer og engagement. I React Native involverer de platform-services (APNs til iOS, FCM til Android), tilladelser, device tokens og håndtering af notification-events.
Hvordan push-notifikationer fungerer (flowet)
1. The app requests notification PERMISSION from the user (especially iOS — opt-in)
2. The device registers and gets a unique push TOKEN (identifies this device/app install)
3. The app sends the token to YOUR SERVER (stores it to target this device)
4. Your server sends a notification → via the platform service:
APNs (Apple Push Notification service) for iOS, FCM (Firebase Cloud Messaging) for Android
5. The platform delivers it to the device → the app shows/handles it
→ Notifications work even when the app is closed (the OS handles delivery).
