What are the best practices for using middleware in Express.js?

What are the best practices for using middleware in Express.js?

Some best practices include organizing middleware logically, using error-handling middleware, and keeping middleware small and focused.

Can you explain why it's important to keep middleware small and focused?

Keeping middleware small and focused improves readability, maintainability, and makes it easier to test individual components.

What are some common types of middleware I should use?

Common types include logging middleware, authentication middleware, and error-handling middleware.

How do I implement error-handling middleware in my Express app?

You can implement it by defining a middleware function with four parameters: err, req, res, and next. This function should handle the error and send a response.