What are the best practices for writing middleware?

What are the best practices for writing middleware?

When writing middleware, it's important to keep it modular, reusable, and maintainable. Start by defining clear responsibilities for each middleware component.

Can you give me an example of a middleware function?

Sure! A simple example is an authentication middleware that checks if a user is logged in before allowing access to certain routes.

How do I handle errors in middleware?

You can handle errors by using a centralized error-handling middleware that catches errors from other middleware and sends appropriate responses.

What tools can help me test my middleware?

You can use tools like Postman for API testing, and libraries like Mocha or Jest for unit testing your middleware functions.