Web APIs extend JavaScript with powerful browser capabilities. Here's a guide to the most useful ones.
Fetch API
Loading code block...
Web Storage API
Loading code block...
Clipboard API
Loading code block...
Geolocation API
Loading code block...
Notification API
Loading code block...
Intersection Observer API
Loading code block...
ResizeObserver API
Loading code block...
MutationObserver API
Loading code block...
Broadcast Channel API
Loading code block...
Web Workers
Loading code block...
Performance API
Loading code block...
Best Practices
Error Handling:
✓ Always check API availability
✓ Handle permission denials
✓ Provide fallbacks
✓ Use try-catch with async APIs
Performance:
✓ Use observers over polling
✓ Disconnect observers when done
✓ Debounce frequent callbacks
✓ Use workers for heavy tasks
Security:
✓ Validate user input
✓ Handle CORS properly
✓ Be careful with clipboard
✓ Request minimal permissions
Compatibility:
✓ Check browser support
✓ Use feature detection
✓ Provide polyfills
✓ Test across browsers
Conclusion
Web APIs provide powerful browser capabilities. Use Fetch for network requests, Storage for persistence, Observers for efficient DOM watching, and Workers for heavy computation. Always check availability, handle errors gracefully, and clean up resources when done.