https://www.hotelolsanka.cz/sw.js

1importScripts('/node_modules/sw-toolbox/sw-toolbox.js');
2
3const config = {
4    offlinePage: '/offline/'
5};
6
7const IGNORED_URLS = [];
8
9config.filesToCache = [
10    '',
11    config.offlinePage
12];
13
14function requestAccepts(request, contentType) {
15    return request.headers.get('Accept').indexOf(contentType) !== -1;
16}
17
18function fetchHandler(request, values) {
19    if (requestAccepts(request, 'text/html')) {
20        if (shouldNotCache(request)) {
21            return toolbox.networkOnly(request, values);
22        }
23        return toolbox.networkFirst(request, values).catch(function () {
24            return toolbox.cacheOnly(new Request(config.offlinePage), values)
25                .then(function (response) {
26                    return response || new Response('You\'re offline. Sorry.', {
27                        status: 500,
28                        statusText: 'Offline Page Missing'
29                    });
30                });
31        });
32    }
33    return toolbox.cacheFirst(request, values);
34}
35
36function shouldNotCache(request) {
37    return IGNORED_URLS.some(url => request.url.indexOf(url) != -1);
38}
39
40toolbox.options.debug = false;
41toolbox.router.default = toolbox.networkFirst;
42toolbox.router.get('/(.*)', fetchHandler, {origin: self.location.origin});
43toolbox.precache(config.filesToCache);
44toolbox.precache(
45    clients.matchAll({includeUncontrolled: true}).then(l => {
46        return l.map(c => c.url);
47    })
48);
49
50self.addEventListener('activate', () => self.clients.claim());
51
52self.addEventListener('install', () => self.skipWaiting());