How can I implement advanced features in an Express API?

How can I implement advanced features in an Express API?

You can implement advanced features like middleware, error handling, and authentication in your Express API. Would you like to know more about a specific feature?

Yes, tell me about middleware.

Middleware functions are functions that have access to the request, response, and the next middleware function. They can modify the request and response objects, end the request-response cycle, or call the next middleware in the stack.

How do I create a custom middleware?

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

Can you give me an example of a logging middleware?

Sure! Here's a simple logging middleware:

function logger(req, res, next) {
    console.log(`${req.method} ${req.url}`);
    next();
}
app.use(logger);