https://www.rockfm.ro/firebase-messaging-sw.js

1/* Firebase Cloud Messaging service worker (web push).
2 * Config is passed as query params at registration time (see FcmService). */
3importScripts('https://www.gstatic.com/firebasejs/12.15.0/firebase-app-compat.js');
4importScripts('https://www.gstatic.com/firebasejs/12.15.0/firebase-messaging-compat.js');
5
6const params = new URLSearchParams(location.search);
7
8firebase.initializeApp({
9  apiKey: params.get('apiKey'),
10  projectId: params.get('projectId'),
11  messagingSenderId: params.get('messagingSenderId'),
12  appId: params.get('appId'),
13});
14
15const messaging = firebase.messaging();
16
17messaging.onBackgroundMessage((payload) => {
18  const n = payload.notification || {};
19  self.registration.showNotification(n.title || '', {
20    body: n.body || '',
21    icon: n.icon || undefined,
22    data: payload.data || {},
23  });
24});