Middleware
const myLogger = function(req, res, next) {
console.log("Request IP: " + req.ip);
console.log("Request Method: " + req.method);
console.log("Request date: " + new Date());
next(); // THIS IS IMPORTANT!
}
app.use(myLogger)http://expressjs.com/en/guide/using-middleware.html
MVC
MVC is another common concept in web development and also something that is likely to come up in an interview question. MVC stands for Model, View, Controller and refers to the architecture of your code. Basically, it is a way to organize your application by separating all of the actions into 3 main components: Models, Views and Controllers.
Models are the basic building blocks of your database. So for every type of entry in your DB (book, author, etc. in our Library Project), you’ll create a model that will hold the details of that type of entry. Models define the types of information that get used by your views and controllers.
Views are, of course, the component that generates the UI for your application. In our case, we’ve selected a templating engine that uses data supplied by a controller to display the desired information.
Controllers are the components that decide what view to display and what information is going to be put into it.