sw.js

const CACHE_NAME = 'ytubestats-01.2026_v1';

const urlsToCache = [
  '/',
  '/index.html',
  '/about.html',
  '/privacy.html',
  '/styles.css',
  '/manifest.json',
  '/img/android-chrome-192x192.png',
  '/img/android-chrome-256x256.png',
  '/img/android-chrome-512x512.png'
];

// Install the service worker and cache assets
self.addEventListener('install', event => {
  event.waitUntil(
    caches.open(CACHE_NAME).then(cache => {
      return cache.addAll(urlsToCache);
    })
  );
});

// Activate the service worker and clean up old caches
self.addEventListener('activate', event => {
  event.waitUntil(
    caches.keys().then(cacheNames => {
      return Promise.all(
        cacheNames
          .filter(name => name !== CACHE_NAME)
          .map(name => caches.delete(name))
      );
    })
  );
});

// Fetch assets from cache or network
self.addEventListener('fetch', event => {
  event.respondWith(
    caches.match(event.request).then(response => {
      return response || fetch(event.request);
    })
  );
});