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pwabuilder-sw.js
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//This is the service worker with the Advanced caching
const CACHE = "pwabuilder-offline-page";
importScripts('https://storage.googleapis.com/workbox-cdn/releases/5.1.2/workbox-sw.js');
const HTML_CACHE = "html";
const JS_CACHE = "javascript";
const STYLE_CACHE = "stylesheets";
const IMAGE_CACHE = "images";
const FONT_CACHE = "fonts";
const offlineFallbackPage = "error.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) => {
// Create a request for the offline page
const offlineRequest = new Request(offlineFallbackPage);
// Create a response for the offline page
const offlineResponse = new Response('<html><body><h1>Offline</h1></body></html>', {
headers: {'Content-Type': 'text/html'}
});
// Put them in the cache
return cache.put(offlineRequest, offlineResponse);
})
);
});
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;
}
})());
}
});
workbox.routing.registerRoute(
({event}) => event.request.destination === 'document',
new workbox.strategies.NetworkFirst({
cacheName: HTML_CACHE,
plugins: [
new workbox.expiration.ExpirationPlugin({
maxEntries: 10,
}),
],
})
);
workbox.routing.registerRoute(
({event}) => event.request.destination === 'script',
new workbox.strategies.StaleWhileRevalidate({
cacheName: JS_CACHE,
plugins: [
new workbox.expiration.ExpirationPlugin({
maxEntries: 15,
}),
],
})
);
workbox.routing.registerRoute(
({event}) => event.request.destination === 'style',
new workbox.strategies.StaleWhileRevalidate({
cacheName: STYLE_CACHE,
plugins: [
new workbox.expiration.ExpirationPlugin({
maxEntries: 15,
}),
],
})
);
workbox.routing.registerRoute(
({event}) => event.request.destination === 'image',
new workbox.strategies.StaleWhileRevalidate({
cacheName: IMAGE_CACHE,
plugins: [
new workbox.expiration.ExpirationPlugin({
maxEntries: 15,
}),
],
})
);
workbox.routing.registerRoute(
({event}) => event.request.destination === 'font',
new workbox.strategies.StaleWhileRevalidate({
cacheName: FONT_CACHE,
plugins: [
new workbox.expiration.ExpirationPlugin({
maxEntries: 15,
}),
],
})
);