https://sponsr.ru/firebase-messaging-sw.js

1importScripts('https://www.gstatic.com/firebasejs/8.3.2/firebase-app.js');
2importScripts('https://www.gstatic.com/firebasejs/8.3.2/firebase-messaging.js');
3
4firebase.initializeApp({
5    apiKey: "AIzaSyDboPXQng1sO_B72QiT4MFCEmnEqj2_Vng",
6    authDomain: "sponsr-1596726779286.firebaseapp.com",
7    projectId: "sponsr-1596726779286",
8    storageBucket: "sponsr-1596726779286.appspot.com",
9    messagingSenderId: "368441975986",
10    appId: "1:368441975986:web:744eff3006ab556ad415ab"
11});
12
13const messaging = firebase.messaging();
14
15messaging.setBackgroundMessageHandler(function(payload) {
16    payload.data.data = JSON.parse(JSON.stringify(payload.data));
17    return self.registration.showNotification(payload.data.title, payload.data);
18});
19  
20self.addEventListener('notificationclick', function(event) {
21    const target = event.notification.data.click_action || '/';
22    event.notification.close();
23    // This looks to see if the current is already open and focuses if it is
24    event.waitUntil(clients.matchAll({
25      type: 'window',
26      includeUncontrolled: true
27    }).then(function(clientList) {
28      // clientList always is empty?!
29      for (var i = 0; i < clientList.length; i++) {
30        var client = clientList[i];
31        if (client.url === target && 'focus' in client) {
32          return client.focus();
33        }
34      }
35  
36      return clients.openWindow(target);
37    }));
38});