
self.addEventListener('install', (e) => {
  self.skipWaiting();
});
self.addEventListener('activate', (e) => {
  self.registration.unregister()
    .then(() => self.clients.matchAll())
    .then((clients) => {
      clients.forEach((client) => {
        if (client instanceof WindowClient)
          client.navigate(client.url);
      });
      return Promise.resolve();
    })
    .then(() => {
      self.caches.keys().then((cacheNames) => {
        Promise.all(
          cacheNames.map((cacheName) => {
            return self.caches.delete(cacheName);
          }),
        );
      })
    });
});
    