Node.js can use external libraries for its operations
var socket = require( ‘socket.io’ );
var express = require( ‘express’ );
var http = require( ‘http’ );
The command used for include external library is “require”
The most commonly used framework in node.js is “Express”
The main advantage of node is non blockable I/O(Input/Output) and also it following a single threaded method.
Node js has two important sections
1) . Event Selection.
2). Event Handling.
Areas where node js can use
2.Real time web applications