app.use() See http://expressjs.com/api.html#app.use

Mounts the middleware function(s) at the path. If path is not specified, it defaults to “/”.
Middleware is a bunch of functions that occur in order on the request. Middleware can:

Execute any code.
Make changes to the request and the response objects.
End the request-response cycle.
Call the next middleware in the stack.

There are several levels of middleware:

Application-level middleware
- Bound to an instance of the Express application
// use body parser so we can grab information from POST requests
app.use(bodyParser.urlencoded({ extended: true }));
app.use(bodyParser.json());
Router-level middleware
-
Error-handling middleware
Built-in middleware
Third-party middleware

	Created by James Drummond over 9 years ago

A-Level Node / Express / Mongo Note on Mongoose and express, created by James Drummond on 20/04/2015.