self.addEventListener('install', (event) => {
  event.waitUntil(self.skipWaiting());
});

self.addEventListener('activate', (event) => {
  event.waitUntil(
    caches.keys()
      .then((keys) => Promise.all(keys.map((key) => caches.delete(key))))
      .then(() => self.registration.unregister())
      .then(() => self.clients.matchAll({ type: 'window' }))
      .then((clients) => clients.forEach((client) => client.navigate(client.url)))
  );
});