draft PWA

snipplets/projects/PWA/serviceWorker.js

@@ -0,0 +1,27 @@
+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);
+    }),
+  );
+});