const staticExamplePWA = 'example-pwa-site-v1';
const assets = [
  '/',
  '/index.html',
  '/styles.css',
  '/app.js',
  '/images/Bear.png',
  '/images/DeusEx.png',
  '/images/Face.png',
  '/images/Tony_Stark.jpg',
];

self.addEventListener('install', (installEvent) => {
  installEvent.waitUntil(
    caches.open(staticExamplePWA).then((cache) => {
      cache.addAll(assets);
    }),
  );
});

self.addEventListener('fetch', (fetchEvent) => {
  fetchEvent.respondWith(
    caches.match(fetchEvent.request).then((res) => {
      return res || fetch(fetchEvent.request);
    }),
  );
});