Graceful Error Handling in Web Applications

Frontend Error Handling

Frontend error handling is about maintaining a good user experience when things go wrong. Implement error boundaries in React to catch rendering errors and display fallback UIs instead of white screens. Handle API errors by showing contextual error messages — "Unable to load your orders, please try again" is far more helpful than "Error 500". Implement optimistic updates with rollback — update the UI immediately and revert if the API call fails. Use retry logic with exponential backoff for transient failures like network timeouts.

Backend Error Strategies

Backend error handling must balance security with debuggability. Never expose stack traces, database errors, or internal details in API responses — return generic error messages to clients while logging full details internally. Use structured error responses with consistent fields: error code, user-friendly message, and optional details. Implement global error handling middleware that catches unhandled exceptions, logs them with full context, and returns a clean 500 response. Set up error monitoring with tools like Sentry to track errors in real time with grouping, assignment, and resolution tracking.

• Structured error responses: Return consistent error format with code, message, and details
• Error monitoring: Use Sentry or similar tools for real-time error tracking and alerting
• Request context logging: Log request ID, user ID, and relevant state with every error
• Graceful degradation: Disable non-critical features rather than crashing the entire app

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