What is middleware in Express?

Can you explain what middleware is in Express?

Middleware in Express refers to functions that have access to the request, response, and the next middleware function in the application’s request-response cycle.

How does middleware work in a typical Express application?

In a typical Express application, middleware functions can perform tasks such as executing code, modifying the request and response objects, ending the request-response cycle, and calling the next middleware function.

Can you give me an example of a middleware function?

Sure! A simple example is a logging middleware that logs the request method and URL: app.use((req, res, next) => { console.log(req.method, req.url); next(); });.

What are some common use cases for middleware?

Common use cases include logging, authentication, error handling, and serving static files.