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@@ -1,45 +1,62 @@ | ||
importScripts('https://storage.googleapis.com/workbox-cdn/releases/5.1.2/workbox-sw.js'); | ||
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// Define your cache name | ||
const CACHE = "pwabuilder-page"; | ||
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// TODO: replace the following with the correct offline fallback page i.e.: const offlineFallbackPage = "offline.html"; | ||
const offlineFallbackPage = "ToDo-replace-this-name.html"; | ||
// Replace this with the actual offline page | ||
const offlineFallbackPage = "/"; | ||
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// Workbox Precache and Routing | ||
workbox.precaching.precacheAndRoute([ | ||
{ url: '/', revision: '1' }, | ||
{ url: '/index.html', revision: '1' }, | ||
{ url: '/styles.css', revision: '1' }, | ||
{ url: '/script.js', revision: '1' }, | ||
{ url: '/icon.png', revision: '1' }, | ||
{ url: `/${offlineFallbackPage}`, revision: '1' } | ||
]); | ||
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// Fallback for offline page | ||
self.addEventListener('install', async event => { | ||
event.waitUntil( | ||
caches.open(CACHE).then(function (cache) { | ||
return cache.addAll([ | ||
offlineFallbackPage, | ||
'/index.html', | ||
'/styles.css', | ||
'/script.js', | ||
'/icon.png' | ||
]); | ||
}) | ||
); | ||
self.skipWaiting(); | ||
}); | ||
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self.addEventListener("message", (event) => { | ||
if (event.data && event.data.type === "SKIP_WAITING") { | ||
self.skipWaiting(); | ||
} | ||
// Fetch event to serve from cache or fallback to network | ||
self.addEventListener('fetch', event => { | ||
event.respondWith( | ||
caches.match(event.request).then(cachedResponse => { | ||
return cachedResponse || fetch(event.request).catch(() => { | ||
// If both fail, show the offline fallback page | ||
return caches.match(offlineFallbackPage); | ||
}); | ||
}) | ||
); | ||
}); | ||
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self.addEventListener('install', async (event) => { | ||
// Activate the new service worker and clean up old caches | ||
self.addEventListener('activate', event => { | ||
const cacheWhitelist = [CACHE]; | ||
event.waitUntil( | ||
caches.open(CACHE) | ||
.then((cache) => cache.add(offlineFallbackPage)) | ||
caches.keys().then(keyList => | ||
Promise.all( | ||
keyList.map(key => { | ||
if (!cacheWhitelist.includes(key)) { | ||
return caches.delete(key); | ||
} | ||
}) | ||
) | ||
) | ||
); | ||
self.clients.claim(); | ||
}); | ||
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if (workbox.navigationPreload.isSupported()) { | ||
workbox.navigationPreload.enable(); | ||
} | ||
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self.addEventListener('fetch', (event) => { | ||
if (event.request.mode === 'navigate') { | ||
event.respondWith((async () => { | ||
try { | ||
const preloadResp = await event.preloadResponse; | ||
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if (preloadResp) { | ||
return preloadResp; | ||
} | ||
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const networkResp = await fetch(event.request); | ||
return networkResp; | ||
} catch (error) { | ||
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const cache = await caches.open(CACHE); | ||
const cachedResp = await cache.match(offlineFallbackPage); | ||
return cachedResp; | ||
} | ||
})()); | ||
} | ||
}); |