Create sw.js

sw.js

@@ -0,0 +1,53 @@
+const CACHE_NAME = 'cache-v2';
+const urlsToCache = [
+  '/index.html',
+  '/robots.txt',
+  '/manifest.json',
+  '/privacy.html',
+  '/termofuse.html',
+  '/index.js',
+  '/icons/icon-72x72.png',
+  '/icons/icon-96x96.png',
+  '/icons/icon-128x128.png',
+  '/icons/icon-144x144.png',
+  '/icons/icon-152x152.png',
+  '/icons/icon-192x192.png',
+  '/icons/icon-384x384.png',
+  '/icons/icon-512x512.png',
+];
+
+self.addEventListener('install', event => {
+  event.waitUntil(
+    caches.open(CACHE_NAME)
+      .then(cache => cache.addAll(urlsToCache))
+      .then(() => console.log('Cache successfully initialized'))
+      .catch(error => console.log('Cache initialization failed:', error))
+  );
+});
+
+self.addEventListener('fetch', event => {
+  event.respondWith(
+    caches.match(event.request)
+      .then(response => {
+        if (response) {
+          return response;
+        }
+        return fetch(event.request);
+      })
+      .catch(error => console.log('Fetch error:', error))
+  );
+});
+
+self.addEventListener('activate', event => {
+  event.waitUntil(
+    caches.keys().then(cacheNames => {
+      return Promise.all(
+        cacheNames.map(cacheName => {
+          if (cacheName !== CACHE_NAME) {
+            return caches.delete(cacheName);
+          }
+        })
+      );
+    })
+  );
+});