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Implement Middleware

Explore how to implement middleware in Express applications to modify request and response objects. Learn to create application-level middleware that logs incoming requests, understand the middleware execution order, and see how calling next() controls the flow to route handlers. This lesson teaches you to set up middleware functions to enhance REST API capabilities in Node.js.

In the previous lesson, we used a middleware function, express.static(), to serve static files to the client. We can use middleware functions for various tasks, such as logging, authentication, parsing data, and so on.

Middleware

Middleware functions are those that alter the request (req) and response (res) objects in the request-response cycle of an ...