First template code generated from replit.com

client/public/sw.js

@@ -0,0 +1,95 @@
+// Service Worker for WarehouseTrack Pro PWA
+const CACHE_NAME = 'warehousetrack-v1';
+const urlsToCache = [
+  '/',
+  '/manifest.json',
+  '/src/index.css',
+  '/src/main.tsx',
+  'https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,300;0,400;0,500;0,700;1,300;1,400;1,500;1,700&display=swap'
+];
+
+// Install event
+self.addEventListener('install', (event) => {
+  event.waitUntil(
+    caches.open(CACHE_NAME)
+      .then((cache) => cache.addAll(urlsToCache))
+      .then(() => self.skipWaiting())
+  );
+});
+
+// Activate event
+self.addEventListener('activate', (event) => {
+  event.waitUntil(
+    caches.keys().then((cacheNames) => {
+      return Promise.all(
+        cacheNames.map((cacheName) => {
+          if (cacheName !== CACHE_NAME) {
+            return caches.delete(cacheName);
+          }
+        })
+      );
+    }).then(() => self.clients.claim())
+  );
+});
+
+// Fetch event - Network First Strategy for API calls, Cache First for static assets
+self.addEventListener('fetch', (event) => {
+  const { request } = event;
+  
+  // Handle API requests with network-first strategy
+  if (request.url.includes('/api/')) {
+    event.respondWith(
+      fetch(request)
+        .then((response) => {
+          // Don't cache POST/PUT/DELETE requests
+          if (request.method === 'GET' && response.status === 200) {
+            const responseClone = response.clone();
+            caches.open(CACHE_NAME)
+              .then((cache) => cache.put(request, responseClone));
+          }
+          return response;
+        })
+        .catch(() => {
+          // Fall back to cache if network fails
+          return caches.match(request);
+        })
+    );
+    return;
+  }
+  
+  // Handle static assets with cache-first strategy
+  event.respondWith(
+    caches.match(request)
+      .then((response) => {
+        // Return cached version or fetch from network
+        return response || fetch(request)
+          .then((response) => {
+            // Don't cache non-successful responses
+            if (!response || response.status !== 200 || response.type !== 'basic') {
+              return response;
+            }
+            
+            const responseToCache = response.clone();
+            caches.open(CACHE_NAME)
+              .then((cache) => cache.put(request, responseToCache));
+            
+            return response;
+          });
+      })
+  );
+});
+
+// Handle background sync for offline actions
+self.addEventListener('sync', (event) => {
+  if (event.tag === 'stock-update') {
+    event.waitUntil(
+      // Handle offline stock updates when back online
+      handleOfflineStockUpdates()
+    );
+  }
+});
+
+// Placeholder function for handling offline updates
+function handleOfflineStockUpdates() {
+  return Promise.resolve();
+}