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docs/PWA_SETUP.md
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docs/PWA_SETUP.md
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# PWA Setup Guide
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## ✅ Implemented Features
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### 1. Service Worker
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- **Caching Strategy**: Aggressive prefetch for app shell
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- **API Caching**: Freshness strategy with 1-hour cache (max 100 requests)
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- **Image Caching**: Performance strategy with 7-day cache (max 50 images)
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- **Configuration**: `ngsw-config.json`
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### 2. Web App Manifests
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- **Dexar**: `public/manifest.webmanifest` (purple theme #a855f7)
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- **Novo**: `public/manifest.novo.webmanifest` (green theme #10b981)
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- **Features**:
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- Installable on mobile/desktop
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- Standalone display mode
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- 8 icon sizes (72px to 512px)
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- Russian language metadata
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### 3. Offline Support
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- App shell loads instantly from cache
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- API responses cached for 1 hour
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- Product images cached for 7 days
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- Automatic background updates
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## 🚀 Testing PWA Functionality
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### Local Testing with Production Build
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```bash
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# Build for production
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npm run build -- --configuration=production
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# Serve the production build
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npx http-server dist/dexarmarket -p 4200 -c-1
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# For Novo brand
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npx http-server dist/novomarket -p 4201 -c-1
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```
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### Chrome DevTools Testing
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1. Open `http://localhost:4200`
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2. Open DevTools (F12)
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3. Go to **Application** tab
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4. Check:
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- **Service Workers**: Should show registered worker
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- **Cache Storage**: Should show `ngsw:/:db`, `ngsw:/:assets`
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- **Manifest**: Should show app details
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### Install Prompt Testing
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1. Open app in Chrome/Edge
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2. Click the **install icon** in address bar (➕)
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3. Confirm installation
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4. App opens as standalone window
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5. Check Start Menu/Home Screen for app icon
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### Offline Testing
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1. Open app while online
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2. Navigate through pages (loads assets)
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3. Open DevTools → Network → Toggle **Offline**
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4. Refresh page - should still work!
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5. Navigate to cached pages - should load instantly
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## 📱 Mobile Testing
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### Android Chrome
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1. Open app URL
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2. Chrome shows "Add to Home Screen" banner
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3. Install and open - works like native app
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4. Splash screen with your logo/colors
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### iOS Safari
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1. Open app URL
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2. Tap Share → "Add to Home Screen"
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3. Icon appears on home screen
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4. Opens in full-screen mode
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## 🔧 Configuration Details
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### Service Worker Caching Strategy
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```json
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{
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"app": {
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"installMode": "prefetch", // Download immediately
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"updateMode": "prefetch" // Auto-update in background
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},
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"assets": {
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"installMode": "lazy", // Load on-demand
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"updateMode": "prefetch"
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},
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"api-cache": {
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"strategy": "freshness", // Network first, fallback to cache
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"maxAge": "1h" // Keep for 1 hour
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},
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"product-images": {
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"strategy": "performance", // Cache first, update in background
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"maxAge": "7d" // Keep for 7 days
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}
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}
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```
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### Manifest Differences
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| Property | Dexar | Novo |
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|----------|-------|------|
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| Theme Color | #a855f7 (purple) | #10b981 (green) |
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| Name | Dexar Market | Novo Market |
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| Icons | Default Angular | Default Angular |
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| Background | White (#ffffff) | White (#ffffff) |
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## 🎨 Custom Icons (Recommended)
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Replace the default Angular icons with brand-specific ones:
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```bash
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public/icons/
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├── icon-72x72.png # Smallest (splash screen)
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├── icon-96x96.png
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├── icon-128x128.png
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├── icon-144x144.png
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├── icon-152x152.png # iOS home screen
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├── icon-192x192.png # Android home screen
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├── icon-384x384.png
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└── icon-512x512.png # Largest (splash, install prompt)
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```
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**Design Guidelines**:
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- Use solid background color (purple for Dexar, green for Novo)
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- Center white logo/icon
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- Keep design simple (shows at small sizes)
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- Export as PNG with transparency or solid background
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## 🔄 Update Strategy
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### How Updates Work
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1. User visits app
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2. Service worker checks for updates
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3. New version downloads in background
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4. User refreshes → gets updated version
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5. Old cache automatically cleared
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### Force Update (Development)
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```bash
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# Clear all caches
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chrome://serviceworker-internals/ # Unregister worker
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chrome://settings/clearBrowserData # Clear cache
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# Or in code (add to app.config.ts)
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navigator.serviceWorker.getRegistrations().then(registrations => {
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registrations.forEach(reg => reg.unregister());
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});
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```
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## 📊 Performance Benefits
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### Before PWA
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- Initial load: ~2-3s (network dependent)
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- Subsequent loads: ~1-2s
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- Offline: ❌ Not available
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### After PWA
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- Initial load: ~2-3s (first visit)
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- Subsequent loads: **~200-500ms** (cached)
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- Offline: ✅ **Fully functional**
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- Install: ✅ **Native app experience**
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## 🐛 Troubleshooting
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### Service Worker Not Registering
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- Check console for errors
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- Ensure HTTPS (or localhost)
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- Clear browser cache and reload
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### Old Version Not Updating
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- Hard refresh: `Ctrl+Shift+R` (Windows) or `Cmd+Shift+R` (Mac)
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- Unregister worker in DevTools
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- Wait 24 hours (automatic update)
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### Manifest Not Loading
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- Check `index.html` has `<link rel="manifest">`
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- Verify manifest path is correct
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- Check manifest JSON is valid (no syntax errors)
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### Icons Not Showing
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- Check icon paths in manifest
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- Ensure icons exist in `public/icons/`
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- Verify icon sizes match manifest
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## 📚 Next Steps
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1. **Custom Icons**: Create brand-specific icons for both themes
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2. **Push Notifications**: Add user engagement (requires backend)
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3. **Background Sync**: Queue offline orders, sync when online
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4. **Analytics**: Track PWA installs, offline usage
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5. **A2HS Prompt**: Show custom "Install App" banner
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## 🔗 Resources
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- [PWA Checklist](https://web.dev/pwa-checklist/)
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- [Angular PWA Guide](https://angular.dev/ecosystem/service-workers)
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- [Manifest Generator](https://www.simicart.com/manifest-generator.html/)
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- [Icon Generator](https://realfavicongenerator.net/)
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