javascript – Badge Not Displayed on iOS PWA Regardless of Receiving Push Notifications

I am engaged on a Progressive Internet App (PWA) with Firebase for push notifications.
My objective is to show a badge for unread messages on the app icon when notifications are acquired, utilizing the service employee.

Here is the of my service employee code:

importScripts('https://www.gstatic.com/firebasejs/8.10.0/firebase-app.js');
importScripts('https://www.gstatic.com/firebasejs/8.10.0/firebase-messaging.js');

const firebaseConfig = {
    apiKey: "...",
    authDomain: "...",
    projectId: "...",
    storageBucket: "...",
    messagingSenderId: "...",
    appId: "...",
    measurementId: "..."
    };

let badgeCount = 0;

console.log('employee: [firebase-messaging-sw.js] Loaded');

firebase.initializeApp(firebaseConfig);

const messaging = firebase.messaging();

messaging.onBackgroundMessage((payload) => {
  console.log('employee: [firebase-messaging-sw.js] Obtained background message ', payload);
  badgeCount++; // Increment badge depend for every message
  if (navigator.setAppBadge) {
      navigator.setAppBadge(badgeCount).catch((error) => {
          console.error('Error setting badge:', error);
      });
  }

  const notificationTitle = payload.notification.title;
  const notificationOptions = {
      physique: payload.notification.physique,
  };
  return self.registration.showNotification(notificationTitle, notificationOptions);
});

self.addEventListener('notificationclick', perform (occasion) {
  // Deal with notification click on occasion right here
  console.log('Notification clicked:', occasion);
});

self.addEventListener('notificationclose', perform (occasion) {
  // Deal with notification shut occasion right here
  console.log('Notification closed:', occasion);
});

Notifications are efficiently acquired, however the badge depend doesn’t show on iOS gadgets (examined solely on iOS). If I set the app badge on to 99 this additionally works. I believe the”onBackgroundMessage” just isn’t known as if I recive an online push.

What’s the corret method to do that?