Error Handling in Node.js: Beyond Try/Catch (2026)

Good error handling isn't about catching errors — it's about handling them gracefully so your app stays running.

The Philosophy

Bad error handling: → try/catch everything silently → bugs disappear, no one knows why → console.error(err) and move on → logs nobody reads → process.exit(1) on any error → crashes production → Return null/undefined → caller doesn't know WHY it failed

Good error handling: → Every error has a code and context → debugging is fast → Errors are categorized → different types get different treatment → Recovery is automatic where possible → self-healing apps → Users see helpful messages → not stack traces or "something went wrong"

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Custom Error Classes

// Base application error class AppError extends Error { constructor ( message , statusCode = 500 , code = ' INTERNAL_ERROR ' ) { super ( message ); this . name = ' AppError ' ; this . statusCode = statusCode ; this . code = code ; this .…