About push-notifications
A skill guide to implementing push notifications in mobile apps, covering basic Expo Notifications and Firebase usage. It is for developers handling foreground and background notifications and connecting notifications to a backend.
Key features
- 01Install Expo notification dependencies
- 02Configure a notification handler
- 03Listen for foreground notifications
- 04Send notifications to the Expo push endpoint
- 05Get FCM tokens and handle background messages
Use cases
- 01Configure notification display and sound in an Expo app
- 02Handle notifications received while the app is foregrounded
- 03Send messages from a backend to Expo device tokens
- 04Handle Firebase background pushes in a bare workflow
Install
Copy the command and run it in a terminal.
$
npx skills add https:/ / github.com/ timequity/ vibe-coder --skill push-notificationsAfter installing, type/push-notificationsin Claude Code to confirm it loaded.
Details
From the project READMEPush Notifications
Expo Notifications
npx expo install expo-notifications expo-device
import * as Notifications from 'expo-notifications';
import * as Device from 'expo-device';
// Configure
Notifications.setNotificationHandler({
handleNotification: async () => ({
shouldShowAlert: true,
shouldPlaySound: true,
shouldSetBadge: true,
}),
});
// Request permission
async function registerForPushNotifications() {
if (!Device.isDevice) return null;
const { status: existingStatus } = await Notifications.getPermissionsAsync();
let finalStatus = existingStatus;
if (existingStatus !== 'granted') {
const { status } = await Notifications.requestPermissionsAsync();
finalStatus = status;
}
if (finalStatus !== 'granted') return null;
const token = await Notifications.getExpoPushTokenAsync({
projectId: 'your-project-id',
});
return token.data;
}
Handle Notifications
// Foreground
useEffect(() => {
const subscription = Notifications.addNotificationReceivedListener(
(notification) => {
console.log('Received:', notification);
}
);
return () => subscription.remove();
}, []);
// Tap response
useEffect(() => {
const subscription = Notifications.addNotificationResponseReceivedListener(
(response) => {
const data = response.notification.request.content.data;
// Navigate based on data
navigation.navigate(data.screen, data.params);
}
);
return () => subscription.remove();
}, []);
Backend Integration
// Send from server
await fetch('https://exp.host/--/api/v2/push/send', {
method: 'POST',
headers: { 'Content-Type': 'application/json' },
body: JSON.stringify({
to: expoPushToken,
title: 'New message',
body: 'You have a new message',
data: { screen: 'Chat', chatId: '123' },
}),
});
Firebase (bare workflow)
import messaging from '@react-native-firebase/messaging';
// Get FCM token
const fcmToken = await messaging().getToken();
// Background handler
messaging().setBackgroundMessageHandler(async (message) => {
console.log('Background message:', message);
});
Comments
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