init

test.txt

@@ -0,0 +1,28 @@
+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);
+      }
+    }),
+  );
+});