self.addEventListener('push', function(event) {
  event.waitUntil(self.registration.showNotification('ServiceWorker Cookbook', {
    body: 'Alea iacta est',
    tag: 'push',
  }));
});

self.addEventListener('push', function(event) {
  event.waitUntil(self.registration.showNotification('ServiceWorker Cookbook', {
    body: 'Alea iacta est',
  }));
});

Remove tag since it isn't useful for this recipe
Remove tag since it isn't useful for this recipe
