text: // This is the "Offline page" service worker
  
  importScripts('https://storage.googleapis.com/workbox-cdn/releases/5.0.0/workbox-gpcasas_sw.js');
  
  const CACHE = "pwabuilder-page";
  
  // TODO: replace the following with the correct offline fallback page i.e.: const offlineFallbackPage = "offline.html";
  const offlineFallbackPage = "/home/offline";
  
  self.addEventListener("message", (event) => {
      if (event.data && event.data.type === "SKIP_WAITING") {
          self.skipWaiting();
      }
  });
  
  self.addEventListener('install', async (event) => {
      event.waitUntil(
          caches.open(CACHE)
              .then((cache) => cache.add(offlineFallbackPage))
      );
  });
  
  if (workbox.navigationPreload.isSupported()) {
      workbox.navigationPreload.enable();
  }
  
  self.addEventListener('fetch', (event) => {
      if (event.request.mode === 'navigate') {
          event.respondWith((async () => {
              try {
                  const preloadResp = await event.preloadResponse;
  
                  if (preloadResp) {
                      return preloadResp;
                  }
  
                  const networkResp = await fetch(event.request);
                  return networkResp;
              } catch (error) {
  
                  const cache = await caches.open(CACHE);
                  const cachedResp = await cache.match(offlineFallbackPage);
                  return cachedResp;
              }
          })());
      }
  });
  