wip

src/service-worker.template.js

@@ -43,9 +43,32 @@ self.addEventListener('activate', (event) => {
 });
 
 self.addEventListener('fetch', (event) => {
+    console.log("new fetch event in sw", event);
     event.respondWith(
         caches.open(cacheName)
             .then(cache => cache.match(event.request))
             .then((response) => response || fetch(event.request))
     );
 });
+
+// service-worker.js
+// Listen to the request
+self.addEventListener('message', (event) => {
+  if (event.data && event.data.type === 'PING') {
+    // Select who we want to respond to
+    self.clients.matchAll({
+      includeUncontrolled: true,
+      type: 'window',
+    }).then((clients) => {
+      if (clients && clients.length) {
+        // Send a response - the clients
+        // array is ordered by last focused
+        clients[0].postMessage({
+          type: 'PONG',
+          files: OFFLINE_FILES,
+          version: VERSION,
+        });
+      }
+    });
+  }
+});