const CACHE = 'omsorg-v1';
const STATIC = ['./app.css'];

self.addEventListener('install', e =>
  e.waitUntil(caches.open(CACHE).then(c => c.addAll(STATIC)))
);

self.addEventListener('fetch', e => {
  if (e.request.url.endsWith('.php') || e.request.method !== 'GET') return;
  e.respondWith(
    fetch(e.request).catch(() => caches.match(e.request))
  );
});