What are some common middleware errors in Express?

What are some common middleware errors I might encounter in Express?

Some common middleware errors in Express include missing next() calls, incorrect order of middleware, and handling errors improperly.

Can you explain what happens if I forget to call next()?

If you forget to call next(), the request will hang and not proceed to the next middleware or route handler, causing a timeout.

How can I handle errors in middleware properly?

To handle errors in middleware, you can define an error-handling middleware function with four parameters: err, req, res, and next.

What is the correct order to use middleware in Express?

The correct order is to define application-level middleware, then route-specific middleware, and finally error-handling middleware.