What are some examples of middleware in web development?

What are some examples of middleware in web development?

Middleware is software that acts as a bridge between different applications or services. Examples include Express.js for Node.js, which handles HTTP requests, and middleware for authentication like Passport.js.

Can you explain how Express.js middleware works?

Sure! In Express.js, middleware functions are functions that have access to the request and response objects. They can modify the request, end the response, or call the next middleware function in the stack.

What is the role of authentication middleware?

Authentication middleware checks if a user is authenticated before allowing access to certain routes. It typically verifies tokens or session data.

Are there any other types of middleware I should know about?

Yes, there are several types, including logging middleware, error handling middleware, and body parsing middleware, each serving different purposes in the request-response cycle.