self.addEventListener('install', (event) => { event.waitUntil( caches.open('mtg-csv-generator-v1').then((cache) => { return cache.addAll([ '/', '/index.html', '/styles.css', '/app.js', '/manifest.json', '/icon.png' ]); }) ); }); self.addEventListener('fetch', (event) => { event.respondWith( caches.match(event.request).then((response) => { return response || fetch(event.request); }) ); });