const CACHE_NAME='zcc-offering-star-v2';
const URLS=['zcc.html','manifest.json','zcc-icon-192.png','zcc-icon-512.png','zcc-icon-90.png'];
self.addEventListener('install', e=>{
  e.waitUntil(caches.open(CACHE_NAME).then(c=>c.addAll(URLS)));
});
self.addEventListener('fetch', e=>{
  e.respondWith(caches.match(e.request).then(r=>r||fetch(e.request)));
});