bb-tech-error-handling

Preventing stack trace exposure in Express API responses requires backend error sanitization. This technique intercepts raw technical errors via middleware, logs them centrally for debugging, and returns generic, user-friendly messages to the client instead of sensitive data.

Structuring custom error classes for an Express backend involves creating semantic error types like NotFoundError or BusinessLogicError. These custom classes map specific application failures directly to appropriate HTTP status codes for consistent API responses.

Centralized logging with sanitized client messages in TypeScript separates technical logs from user output. When a process fails, the full technical error is logged to the console, while the API responds with a controlled, generic message to prevent data leakage.

Yes, this error handling approach supports development environments differently by controlling stack trace visibility. Raw error traces and messages are hidden from clients except in development environments, ensuring production security while maintaining developer debuggability.

API endpoints return raw internal error messages to users when lacking a centralized error handling middleware. Implementing a sanitization layer catches unexpected failures, logs the technical details safely, and maps them to controlled, generic client responses.