Node Error Handling

A guide to handling errors gracefully in Node.js applications with proper error classification, logging, and recovery.

Usage

Ask about error handling patterns, custom error classes, async errors, or graceful shutdown.

Examples

• "Create a custom error class hierarchy for an API"
• "How do I handle unhandled promise rejections?"
• "Implement graceful shutdown on fatal errors"

Guidelines

• Distinguish between operational errors and programmer errors
• Use custom error classes with status codes and error codes
• Always handle promise rejections with catch or try/catch
• Set up process-level handlers for uncaught exceptions
• Log errors with context for debugging