What Is Node and When Should I Use It?

Node.js is an open source server environment,is free, runs on various platforms and uses JavaScript on the server.

Why Node.js?

A common task for a web server can be to open a file on the server and return the content to the client.

What Can Node.js Do?

• Node.js can generate dynamic page content.

• Node.js can create, open, read, write, delete, and close files on the server.

• Node.js can collect form data.

• Node.js can add, delete, modify data in your database.

What is a Node.js File?

• Node.js files contain tasks that will be executed on certain events.

• A typical event is someone trying to access a port on the server.

• Node.js files must be initiated on the server before having any effect.

• Node.js files have extension “.js”.

Initiate the Node.js File

Start your command line interface, write node myfirst.js.

The Built-in HTTP Module

use the require() method.

Node.js as a Web Server

Use the createServer() method to create an HTTP server.