Book Image

Learning Node.js for .NET Developers

Book Image

Learning Node.js for .NET Developers

Overview of this book

Node.js is an open source, cross-platform runtime environment that allows you to use JavaScript to develop server-side web applications. This short guide will help you develop applications using JavaScript and Node.js, leverage your existing programming skills from .NET or Java, and make the most of these other platforms through understanding the Node.js programming model. You will learn how to build web applications and APIs in Node, discover packages in the Node.js ecosystem, test and deploy your Node.js code, and more. Finally, you will discover how to integrate Node.js and .NET code.
Table of Contents (21 chapters)
Learning Node.js for .NET Developers
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface
Index

Creating modules in Node.js


We've actually already used several Node.js modules and created some of our own. Let's look again at our application from Chapter 2, Getting Started with Node.js.

The following code is from routes/index.js and routes/users.js:

module.exports = router;

The following is the code from app.js:

var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');

var routes = require('./routes/index');
var users = require('./routes/users');

Each of our routes (index and users) is a module. They expose their functionality using the built-in module object, which is defined by Node.js as a variable scoped to each module. In the preceding example, the object provided by each of our route modules is an Express router instance. The app.js script imports these modules using the built-in require function.

Observe that app.js also...