Error boundaries catch JavaScript errors in components and display fallback UI. Here's how to use them effectively.
Basic Error Boundary
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Error Boundary with Reset
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react-error-boundary Library
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Granular Error Boundaries
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Error Boundary with Retry
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Suspense with Error Boundary
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Error Reporting Integration
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Error Types and Handling
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Testing Error Boundaries
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Best Practices
Placement:
✓ Wrap major sections independently
✓ Place near data fetching components
✓ Keep user-interactive areas recoverable
✓ Don't wrap everything in one boundary
Recovery:
✓ Provide clear error messages
✓ Offer retry or reset options
✓ Clear relevant cache on reset
✓ Log errors for debugging
UX:
✓ Match fallback UI to component style
✓ Preserve surrounding layout
✓ Show actionable recovery steps
✓ Consider automatic retry for network errors
Conclusion
Error boundaries prevent entire app crashes from component errors. Place them strategically around major sections, provide clear recovery options, and integrate with error reporting services. Use the react-error-boundary library for hooks support and advanced features.