var CACHE_NAME = 'snapdrop-cache-v1.04'; var urlsToCache = [ '/', '/styles.css', '/scripts/network.js', '/scripts/ui.js', '/sounds/blop.mp3', '/images/favicon-96x96.png' ]; self.addEventListener('install', function(event) { // Perform install steps event.waitUntil( caches.open(CACHE_NAME) .then(function(cache) { console.log('Opened cache'); return cache.addAll(urlsToCache); }) ); }); self.addEventListener('fetch', function(event) { event.respondWith( caches.match(event.request) .then(function(response) { // Cache hit - return response if (response) { return response; } return fetch(event.request); } ) ); });