Node.js

Node.js

• Node.js is an open-source, cross-platform, Jav
  
  aScript runtime environment that executes JavaScript code outside of a browser.
• License: MIT license
• Initial release: May 27, 2009
• Original author: Ryan Dahl
• Operating system: Linux, macOS, Microsoft Windows, SmartOS, FreeBSD, OpenBSD, IBM AIX
• Written in: C, C++, JavaScript
• 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
• Node.js runs various platforms
• Website : https://nodejs.org/en/

Structure of Node.js

                             var http = require('http');
                              http.createServer(function (req, res) {
                              res.writeHead();
                              res.end();
                             }).listen();

Advantages of Node.js

• Node.js is an open-source framework under MIT license. (MIT license is a free software license originating at the Massachusetts Institute of Technology (MIT)).
• Uses JavaScript to build entire server side application.
• Lightweight framework that includes bare minimum modules. Other modules can be included as per the need of an application.
• Asynchronous by default. So it performs faster than other frameworks.
• Cross-platform framework that runs on Windows, MAC or Linux

Disadvantage Of Node.js

• Application Programming Interface (API) is Not Stable
• Does not have a Strong Library Support System
• Asynchronous Programming Model

Example For Node.js

            var http = require('http');
             http.createServer(function (req, res) {
              res.writeHead(200, {'Content-Type': 'text/plain'});
              res.end('Hello World!');
               }).listen(8080);


O/P: Hello world