What are the best practices for error handling in Express?

What are the best practices for error handling in Express?

In Express, it's important to use middleware for error handling. You should define an error-handling middleware function that takes four arguments: err, req, res, and next. This allows you to centralize your error handling.

Can you give me an example of an error-handling middleware?

Sure! Here's a simple example:

app.use((err, req, res, next) => {
  console.error(err.stack);
  res.status(500).send('Something broke!');
});

How can I handle different types of errors?

You can check the error type within your middleware and respond accordingly. For instance, you might want to handle validation errors differently from server errors.

What about logging errors?

Logging errors is crucial for debugging. You can use libraries like winston or morgan to log errors to a file or external service.