What is middleware and how does it work in different frameworks?

What is middleware and how does it work in different frameworks?

Middleware is software that acts as a bridge between different applications or services. In web frameworks, it processes requests and responses.

Can you give examples of middleware in popular frameworks?

Sure! In Express.js, middleware functions can handle requests, while in Django, middleware can process requests globally.

How do I create custom middleware in Express?

To create custom middleware in Express, define a function that takes req, res, and next as parameters, then use app.use() to register it.

What are some common use cases for middleware?

Common use cases include authentication, logging, error handling, and request parsing.