error-handling

Structured error handling in a Node backend uses typed error classes and a global handler to standardize responses. This approach attaches request context to logs and sanitizes outputs to simplify debugging and minimize downtime.

Standardizing API error responses in TypeScript involves creating a base AppError class with specialized subclasses like BadRequestError and NotFoundError. This typed model ensures consistent error payloads across backend and frontend layers.

Adding resilience patterns to a backend application involves implementing retry strategies, timeouts, and graceful degradation. These recovery mechanisms keep systems available during partial failures by providing fallbacks instead of crashing.

Error boundaries can gracefully handle React frontend crashes by catching errors without unmounting the app. This UI pattern surfaces errors safely to users and provides recovery options to maintain application availability.

Structured logging improves backend observability by attaching contextual metadata like requestId, path, and method to error logs. This contextual data traces end-to-end error flows, accelerating root cause analysis and debugging.

Sanitizing error data in production environments requires avoiding sensitive data leakage in responses and logs. Always handle errors centrally, attach necessary context securely, and test error paths to ensure compliance and safety.