static/sw.js

self.addEventListener('install', () => self.skipWaiting());

self.addEventListener('activate', (event) => {
  event.waitUntil(clients.claim());
});

self.addEventListener('notificationclick', (event) => {
  event.notification.close();
  event.waitUntil(
    clients.matchAll({ type: 'window' }).then(clientList => {
      for (const client of clientList) {
        if (client.url.includes('/admin') && 'focus' in client) {
          return client.focus();
        }
      }
      if (clients.openWindow) return clients.openWindow('/admin');
    })
  );
});