const CACHE_NAME = 'datumsrechner-cache-v1';
const urlsToCache = [
  '/',
  '/static/favicon.ico',
  '/static/favicon.png',
  '/static/favicon.svg',
  '/static/logo.svg',
  '/static/manifest.json',
];
self.addEventListener('install', event => {
  event.waitUntil(
    caches.open(CACHE_NAME)
      .then(cache => {
        // Füge nur existierende Dateien zum Cache hinzu
        return Promise.allSettled(
          urlsToCache.map(url => 
            cache.add(url).catch(err => {
              console.log('Failed to cache:', url, err);
            })
          )
        );
      })
  );
});
self.addEventListener('fetch', event => {
  event.respondWith(
    caches.match(event.request)
      .then(response => response || fetch(event.request))
  );
});