Express is a basic framework for building web applications and APIs with a Node server. It provides a simple layer of fundamental web application features that complements Node.
In any web application developed with Node, Express can be used as a routing and middleware web framework that has minimal functionality of its own—an Express application is essentially a series of middleware function calls.
Middleware functions are functions that have access to the HTTP request and response objects, and also the next middleware function in the web application's request-response cycle.
It is possible to insert almost any compatible middleware of your choice into the request handling chain, in almost any order, making Express very flexible ...
