Browser Support

Browser compatibility and support information.

Supported Browsers

Desktop Browsers

| Browser | Minimum Version | Status | |---------|----------------|--------| | Chrome | 90+ | ✅ Fully Supported | | Firefox | 88+ | ✅ Fully Supported | | Safari | 14+ | ✅ Fully Supported | | Edge | 90+ | ✅ Fully Supported | | Opera | 76+ | ✅ Fully Supported |

Mobile Browsers

| Browser | Minimum Version | Status | |---------|----------------|--------| | Chrome (Android) | 90+ | ✅ Fully Supported | | Safari (iOS) | 14+ | ✅ Fully Supported | | Firefox (Android) | 88+ | ✅ Fully Supported | | Samsung Internet | 14+ | ✅ Fully Supported |

Feature Support

Core Features

All core features work in supported browsers:

• ✅ Server-side rendering
• ✅ Client-side routing
• ✅ Form handling
• ✅ Image optimization
• ✅ PWA features

Progressive Enhancement

Features gracefully degrade in older browsers:

• Service Worker: Falls back to standard web app
• WebP/AVIF images: Falls back to JPEG/PNG
• CSS Grid: Falls back to Flexbox
• Modern JavaScript: Transpiled to ES5

Polyfills

Automatic Polyfills

Next.js automatically includes polyfills for:

• Fetch API
• Promise
• Object.assign
• Array methods

Manual Polyfills

For additional browser support, add polyfills:

// polyfills.ts
import 'core-js/stable';
import 'regenerator-runtime/runtime';

Testing

Browser Testing

Test in the following browsers:

1. Chrome (latest)
2. Firefox (latest)
3. Safari (latest)
4. Edge (latest)
5. Mobile browsers

Testing Tools

• BrowserStack: Cross-browser testing
• Sauce Labs: Automated testing
• Local Testing: Manual testing in each browser

Known Issues

Safari

• Issue: Service Worker may not work in private browsing
• Workaround: Show message to user
• Status: Browser limitation

Internet Explorer

• Status: Not supported
• Reason: IE is deprecated
• Recommendation: Use modern browser

Feature Detection

Modern Features

// Check for Service Worker support
if ('serviceWorker' in navigator) {
  // Register service worker
}

// Check for WebP support
function supportsWebP() {
  const canvas = document.createElement('canvas');
  return canvas.toDataURL('image/webp').indexOf('data:image/webp') === 0;
}

// Check for Intersection Observer
if ('IntersectionObserver' in window) {
  // Use Intersection Observer
}

Graceful Degradation

// Example: Fallback for missing features
if (typeof window.IntersectionObserver !== 'undefined') {
  // Use Intersection Observer
} else {
  // Fallback to scroll events
}

Performance

Browser Performance

Performance targets by browser:

• Chrome: 90+ Lighthouse score
• Firefox: 90+ Lighthouse score
• Safari: 85+ Lighthouse score
• Edge: 90+ Lighthouse score

Optimization

Optimizations applied:

• Code splitting
• Tree shaking
• Minification
• Compression
• Image optimization

Accessibility

Screen Readers

Tested with:

• ✅ NVDA (Windows)
• ✅ JAWS (Windows)
• ✅ VoiceOver (macOS/iOS)
• ✅ TalkBack (Android)

Keyboard Navigation

• ✅ Tab navigation
• ✅ Arrow keys
• ✅ Enter/Space
• ✅ Escape key

Mobile Support

Responsive Design

• ✅ Mobile-first approach
• ✅ Touch-friendly targets (44x44px minimum)
• ✅ Viewport meta tag
• ✅ Flexible layouts

Mobile Features

• ✅ PWA install
• ✅ Offline support
• ✅ Touch gestures
• ✅ Mobile-optimized images

Browser-Specific Notes

Chrome

• Best performance
• Full feature support
• Recommended for development

Firefox

• Good performance
• Full feature support
• Good developer tools

Safari

• Good performance
• Some limitations with Service Worker
• WebKit-specific features

Edge

• Chromium-based
• Similar to Chrome
• Good performance

Getting Help

If you encounter browser-specific issues:

1. Check browser console for errors
2. Test in multiple browsers
3. Check Troubleshooting Guide
4. Open an issue with browser details

Resources

• Can I Use - Browser compatibility
• MDN Browser Compatibility
• Next.js Browser Support