48 lines
1.1 KiB
JavaScript
48 lines
1.1 KiB
JavaScript
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// This is the "Offline page" service worker
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importScripts('https://storage.googleapis.com/workbox-cdn/releases/5.1.2/workbox-sw.js');
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const CACHE = "pwabuilder-page";
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const offlineFallbackPage = "index.html";
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self.addEventListener("message", (event) => {
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if (event.data && event.data.type === "SKIP_WAITING") {
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self.skipWaiting();
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}
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});
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self.addEventListener('install', async (event) => {
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event.waitUntil(
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caches.open(CACHE)
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.then((cache) => cache.add(offlineFallbackPage))
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);
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});
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if (workbox.navigationPreload.isSupported()) {
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workbox.navigationPreload.enable();
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}
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self.addEventListener('fetch', (event) => {
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if (event.request.mode === 'navigate') {
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event.respondWith((async () => {
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try {
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const preloadResp = await event.preloadResponse;
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if (preloadResp) {
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return preloadResp;
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}
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const networkResp = await fetch(event.request);
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return networkResp;
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} catch (error) {
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const cache = await caches.open(CACHE);
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const cachedResp = await cache.match(offlineFallbackPage);
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return cachedResp;
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}
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})());
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}
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});
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workbox.googleAnalytics.initialize();
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