seniorNode.js
Advanced Error Handling: Domain-specific vs Operational Errors
Updated May 4, 2026
Short answer
Distinguish between Operational Errors (runtime issues) and Programmer Errors (bugs). Handle the former gracefully; crash on the latter.
Deep explanation
Operational errors (like DB timeouts) are expected; handle them with custom error classes. Programmer errors (like undefined property access) make the state untrustworthy; log them and restart.
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