service.worker.install.await-work.js

const CACHE_NAME = 'cache-v1';
const urlsToCache = ['/', '/css/main.css', '/js/main.js'];

self.addEventListener("install", async e => {
  e.waitUntil(cacheResources());
});

const cacheResources = async () => {
  const cache = await caches.open(CACHE_NAME);
  return cache.addAll(urlsToCache);
};