How should I format error responses in an Express.js app?

How should I format error responses in an Express.js app?

In an Express.js app, it's best to return a JSON object for error responses. This should include a status code, an error message, and optionally, additional details.

Can you give me an example of such a JSON error response?

Sure! A typical error response might look like this: {"status": 404, "message": "Resource not found", "details": "The requested user does not exist."}

What status codes should I use for different types of errors?

Common status codes include 400 for bad requests, 401 for unauthorized, 403 for forbidden, and 500 for server errors.

Is it a good practice to include stack traces in error responses?

It's generally not recommended to include stack traces in production error responses for security reasons. Instead, log them on the server.