service.js

const version = "1.13.3";

const cacheId = "FINANCE-" + version;
const files = [
    'apps/android-chrome-192x192.png',
    'apps/android-chrome-512x512.png',
    'apps/apple-touch-icon.png',
    'apps/browserconfig.xml',
    'apps/favicon-16x16.png',
    'apps/favicon-32x32.png',
    'apps/favicon-194x194.png',
    'apps/favicon.ico',
    'apps/icon.svg',
    'apps/manifest.json',
    'apps/mstile-70x70.png',
    'apps/mstile-144x144.png',
    'apps/mstile-150x150.png',
    'apps/mstile-310x150.png',
    'apps/mstile-310x310.png',
    'apps/safari-pinned-tab.svg',
    'css/fonts/open-sans-regular-a.woff2',
    'css/fonts/open-sans-regular-b.woff2',
    'css/fonts/open-sans-regular-c.woff2',
    'css/fonts/open-sans-regular-d.woff2',
    'css/fonts/open-sans-regular-e.woff2',
    'css/fonts/open-sans-regular-f.woff2',
    'css/fonts/open-sans-regular-g.woff2',
    'css/images/github.svg',
    'css/images/paypal.svg',
    'css/fonts.css',
    'css/layout.css',
    'js/model/payment.js',
    'js/model/recurrence.js',
    'js/model/template.js',
    'js/utils/extensions.js',
    'js/utils/encryption.js',
    'js/utils/guid.js',
    'js/dialogs.js',
    'js/engine.js',
    'js/storage.js',
    'js/strings.js',
    'js/ui.js',
    'favicon.ico',
    './',
    'index.html'
];
const cdnFiles = [{
    'url': 'https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.7.3/Chart.bundle.min.js',
    'sri': 'sha256-MZo5XY1Ah7Z2Aui4/alkfeiq3CopMdV/bbkc/Sh41+s='
}];

self.addEventListener('install', e => e.waitUntil(
    caches.open(cacheId).then(async cache => {
        await cache.addAll(files);
        for (let f = 0; f < cdnFiles.length; f++) {
            let request = new Request({
                method: "GET",
                url: cdnFiles[f].url,
                integrity: cdnFiles[f].sri,
                mode: "cors",
                credentials: "omit",
                cache: "default"
            });

            let response = await fetch(cdnFiles[f].url, request);
            await cache.put(request, response);
        }
    })));
self.addEventListener('activate', e => e.waitUntil(caches.keys().then(keys => Promise.all(keys.filter(name => name !== cacheId).map(name => caches.delete(name))))));
self.addEventListener('fetch', e => e.respondWith(caches.match(e.request).then(response => response ? response : fetch(e.request))));