rDrama/files/assets/js/service-worker.js

importScripts("https://js.pusher.com/beams/service-worker.js");

const CACHE = "pwabuilder-offline-page";

importScripts('https://storage.googleapis.com/workbox-cdn/releases/5.1.2/workbox-sw.js');

const offlineFallbackPage = "/assets/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) => {
	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;
			}
		})());
	}
});