sw.js

const CACHE_NAME = 'filetojpg-v1';
const ASSETS_TO_CACHE = [
  '/convert/',
  '/convert/index.html',
  '/convert/styles.css',
  '/convert/app.js',
  'https://cdn.tailwindcss.com',
  'https://cdnjs.cloudflare.com/ajax/libs/pdf.js/2.11.338/pdf.min.js',
  'https://cdnjs.cloudflare.com/ajax/libs/xlsx/0.18.5/xlsx.full.min.js',
  'https://cdnjs.cloudflare.com/ajax/libs/mammoth/1.4.0/mammoth.browser.min.js'
];

self.addEventListener('install', (event) => {
  event.waitUntil(
    caches.open(CACHE_NAME)
      .then((cache) => {
        return cache.addAll(ASSETS_TO_CACHE);
      })
  );
});

self.addEventListener('activate', (event) => {
  event.waitUntil(
    caches.keys().then((cacheNames) => {
      return Promise.all(
        cacheNames.map((cacheName) => {
          if (cacheName !== CACHE_NAME) {
            return caches.delete(cacheName);
          }
        })
      );
    })
  );
});

self.addEventListener('fetch', (event) => {
  event.respondWith(
    caches.match(event.request)
      .then((response) => {
        return response || fetch(event.request);
      })
  );
});