Browser Support - ProteusJS v2.0.0

ProteusJS v2.0.0 leverages modern web platform APIs with intelligent fallbacks for maximum compatibility.

🌐 Browser Compatibility Matrix

Browser

Version

Support Level

Notes

Chrome

88+

βœ… Full Support

All APIs supported

Firefox

85+

βœ… Full Support

All APIs supported

Safari

14+

βœ… Full Support

Some APIs require fallbacks

Edge

88+

βœ… Full Support

All APIs supported

iOS Safari

14+

βœ… Full Support

PWA features limited

Android Chrome

88+

βœ… Full Support

All APIs supported

πŸ”§ API Support & Fallbacks

View Transitions API

  • Supported: Chrome 111+, Edge 111+

  • Fallback: CSS transitions with JavaScript coordination

  • Coverage: Visual transitions maintained, performance optimized

Popover API

  • Supported: Chrome 114+, Firefox 114+, Safari 17+

  • Fallback: Floating UI with ARIA attributes

  • Coverage: Full accessibility and positioning maintained

CSS Anchor Positioning

  • Supported: Chrome 125+ (experimental)

  • Fallback: Floating UI positioning engine

  • Coverage: All positioning features available

Scheduler API

  • Supported: Chrome 94+ (experimental)

  • Fallback: MessageChannel and setTimeout with priority simulation

  • Coverage: Task scheduling and yielding maintained

File System Access API

  • Supported: Chrome 86+, Edge 86+

  • Fallback: Traditional file input with download links

  • Coverage: File operations available with different UX

Web Share API

  • Supported: Chrome 89+, Safari 14+, mobile browsers

  • Fallback: Copy to clipboard with notification

  • Coverage: Sharing functionality maintained

Badging API

  • Supported: Chrome 81+, Edge 81+

  • Fallback: Document title updates

  • Coverage: Notification indication maintained

Speculation Rules API

  • Supported: Chrome 103+ (experimental)

  • Fallback: Link prefetching with intersection observer

  • Coverage: Performance optimization maintained

πŸ“Š Feature Detection

ProteusJS automatically detects browser capabilities:

// Example feature detection
const hasNavigationAPI = 'navigation' in window;
const hasViewTransitions = 'startViewTransition' in document;
const hasPopoverAPI = 'popover' in HTMLElement.prototype;

🎯 Progressive Enhancement Strategy

  1. Core Functionality First: Essential features work in all browsers

  2. Enhanced Experience: Modern APIs provide better UX when available

  3. Graceful Degradation: Fallbacks maintain functionality

  4. Performance Optimization: Modern APIs improve performance when supported

πŸ” Testing Strategy

  • Cross-browser testing on all supported browsers

  • Feature detection testing for API availability

  • Fallback testing when modern APIs unavailable

  • Performance testing across different browser versions

πŸ“± Mobile Considerations

  • iOS Safari: Limited PWA capabilities, full web API support

  • Android Chrome: Full PWA and API support

  • Mobile Firefox: Good API support, limited PWA features

  • Samsung Internet: Generally follows Chrome compatibility

πŸš€ Future Compatibility

ProteusJS v2.0.0 is designed to automatically benefit from new browser API support:

  • Automatic upgrades: When browsers add API support, ProteusJS uses native implementations

  • No code changes: Applications automatically get performance improvements

  • Backward compatibility: Fallbacks remain available for older browsers