https://globalsku.app/serviceworker.js

1var staticCacheName = "pwa-v" + new Date().getTime();
2
3if (!filesToCache){
4    var filesToCache = [
5        '/offline',
6        // Vapor.asset('/css/app.css'),
7        // Vapor.asset('/js/app.js'),
8        //'/images/icons/icon-72x72.png',
9        //'/images/icons/icon-96x96.png',
10        //'/images/icons/icon-128x128.png',
11        //'/images/icons/icon-144x144.png',
12        //'/images/icons/icon-152x152.png',
13        //'/images/icons/icon-192x192.png',
14        //'/images/icons/icon-384x384.png',
15        //'/images/icons/icon-512x512.png',
16    ];
17}
18
19// Cache on install
20self.addEventListener("install", event => {
21    this.skipWaiting();
22    event.waitUntil(
23        caches.open(staticCacheName)
24            .then(cache => {
25                return cache.addAll(filesToCache);
26            })
27    )
28});
29
30// Clear cache on activate
31self.addEventListener('activate', event => {
32    event.waitUntil(
33        caches.keys().then(cacheNames => {
34            return Promise.all(
35                cacheNames
36                    .filter(cacheName => (cacheName.startsWith("pwa-")))
37                    .filter(cacheName => (cacheName !== staticCacheName))
38                    .map(cacheName => caches.delete(cacheName))
39            );
40        })
41    );
42});
43
44// Serve from Cache
45self.addEventListener("fetch", event => {
46    try {
47        // Only handle GET requests.
48        if (event.request.method !== 'GET') return;
49
50        // Do NOT intercept cross-origin requests (e.g. Google Tag Manager).
51        // If those fail (blocked by client / offline), we should not serve our HTML offline page as JS.
52        var url = new URL(event.request.url);
53        if (url.origin !== self.location.origin) return;
54    } catch (e) {
55        // If URL parsing fails for any reason, fall back to default network behavior.
56        return;
57    }
58
59    event.respondWith(
60        caches.match(event.request)
61            .then(response => response || fetch(event.request))
62            .catch(() => {
63                // Only serve the offline page for document navigations.
64                if (event.request.mode === 'navigate') {
65                    return caches.match('/offline');
66                }
67                // For non-navigation requests, let the request fail normally.
68                return Response.error();
69            })
70    );
71});