Using Modern Browser APIs

Prefer native browser capabilities over third-party dependencies. Use progressive enhancement with sensible fallbacks.

Core Principles

• PREFER native APIs over third-party dependencies
• Use progressive enhancement with fallbacks for unsupported APIs
• Use async and secure patterns for safe, non-blocking access

Observation & Monitoring

• Intersection Observer - viewport visibility detection
• ResizeObserver - element sizing changes
• PerformanceObserver - performance metrics

Navigation & Transitions

• View Transitions API - hardware-accelerated state changes
• URLPattern API - declarative URL matching for routing

Data Access

• Clipboard Async API - clipboard operations
• Web Share API - native sharing
• File System Access API - file operations with permissions

Performance

• Web Locks API - coordinate resource access
• Scheduling API - task prioritization
• Web Workers - offload computation from main thread

Implementation Guidance

Always use feature detection:

if ('clipboard' in navigator) { … }

• Prioritize promise-based APIs
• Clearly communicate permission requests to users
• Always provide graceful fallbacks for unsupported browsers