https://paycepays.com/serviceworker.js

1const expectedCaches = ['payce-offline-v13'];
2const cacheName = 'payce-offline-v13';
3
4//Install stage sets up the offline page in the cahche and opens a new cache
5self.addEventListener('install', function (event) {
6    self.skipWaiting();
7    event.waitUntil(preLoad());
8});
9
10var preLoad = function () {
11    return caches.open(cacheName).then(function (cache) {
12        //console.log('Payce Cached offline page during Install');
13        return cache.addAll([
14            '/offline.html',
15            '/Content/bootstrap/css/bootstrap.css',
16            '/Content/bootstrap/css/app.css?' + Math.floor(Math.random() * 10),
17            '/Scripts/jquery-3.5.1.min.js',
18            '/Scripts/bootstrap/bootstrap.js',
19            '/Scripts/fontawesome-all.js',
20            '/Scripts/jquery-plugins/jquery.maskedinput.js',
21            '/Scripts/site.js?03092022'
22        ]);
23    });
24}
25
26self.addEventListener('activate', event => {
27    // delete any caches that aren't in expectedCaches
28    // which will get rid of prior versions
29    event.waitUntil(
30        caches.keys().then(keys => Promise.all(
31            keys.map(key => {
32                if (!expectedCaches.includes(key)) {
33                    return caches.delete(key);
34                }
35            })
36        )).then(() => {
37            //console.log(cacheName + ' now ready to handle fetches!');
38        })
39    );
40});
41
42self.addEventListener('fetch', function (event) {
43    //console.log('Fetch event for ', event.request.url);
44    event.respondWith(
45        caches.match(event.request).then(function(response) {
46            if (response) {
47                //console.log('Found ', event.request.url, ' in cache');
48                return response;
49            }
50            //console.log('Network request for ', event.request.url);
51            return fetch(event.request);
52            
53        }).catch(function(error) {
54            console.info('Network request Failed. Serving offline page');
55            return returnFromCache('offline.html');
56        })
57    );
58});
59
60var returnFromCache = function (request) {
61    return caches.open(cacheName).then(function (cache) {
62        return cache.match(request).then(function (matching) {
63            if (!matching || matching.status === 404) {
64                return cache.match('offline.html');
65            } else {
66                return matching;
67            }
68        });
69    });
70};