#error-handling

I'm getting the following error message in my browser console: "Uncaught TypeError: Cannot read properties of undefined (reading 'map')". Explain what this error means in simple terms, what are the common causes for it, and how I can go about debugging it in my JavaScript code.

Implement robust error handling in Remix. Patterns: 1. Route-level ErrorBoundary for unexpected errors. 2. useRouteError hook to access error details. 3. CatchBoundary for thrown responses (404, 401). 4. Nested error boundaries for granular recovery. 5. Custom error pages with helpful messages. 6. Error logging to external service. 7. Fallback UI with retry button. 8. Development vs production error display. Use loader error throwers for validation failures and graceful degradation.

Handle errors and log effectively. Practices: 1. Catch errors at boundaries. 2. Specific error types vs generic. 3. User-friendly error messages. 4. Detailed logs for debugging. 5. Structured logging (JSON). 6. Log levels (ERROR, WARN, INFO, DEBUG). 7. Correlation IDs for tracing. 8. Never log sensitive data. Use Winston, Pino, or similar. Centralize logs with ELK or Datadog. Monitor error rates.