Push notifications memungkinkan aplikasi untuk memberi notifikasi kepada pengguna bahkan ketika aplikasi tidak terbuka — untuk pesan, pembaruan, dan engagement. Di React Native, mereka melibatkan layanan platform (APNs untuk iOS, FCM untuk Android), izin, device tokens, dan penanganan event notifikasi.
Cara kerja push notifications (alurnya)
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).
