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pwabuilder-sw.js
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pwabuilder-sw.js
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// This is the service worker with the combined offline experience (Offline page + Offline copy of pages)
importScripts('https://storage.googleapis.com/workbox-cdn/releases/5.1.2/workbox-sw.js');
const CACHE = "pwabuilder-offline-page";
const offlineFallbackPage = "/offline.html";
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();
workbox.routing.registerRoute(new RegExp('/*'), new workbox.strategies.StaleWhileRevalidate({ cacheName: CACHE }));
self.addEventListener('fetch', (event) => {
switch (event.request.mode) {
case '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;
}
})());
break;
}
});