self.addEventListener("install", function (event) {
  console.log("[SW install]", event);
  self.skipWaiting();
  event.waitUntil(
    caches.open("static").then((cache) => {
      console.log("[SW precache]");
      return cache.addAll(["/", "/index.html", "/js/app.js"]);
    }),
  );
});

self.addEventListener("activate", function (event) {
  console.log("[SW activate]", event);
  return self.clients.claim();
});

self.addEventListener("fetch", function (event) {
  event.respondWith(
    caches.match(event.request).then((res) => {
      console.log("res", res);
      if (res) {
        return res;
      } else {
        return fetch(event.request);
      }
    }),
  );
});