LearnNodeJS

Node JS Intro

• Node.js is an open source server environment
• Node.js uses JavaScript on the server
• Node.js can generate dynamic page content
• Node.js can create, open, read, write, delete, and close files on the server
• Node.js can add, delete, modify data in your database

Hello World in Node JS

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

• Name the above file as index.js
• Initiate the node js file as follows: node index.js
• Now open your browser and type localhost:8080 and you should see the "Hello World" as output.

Modules in Node JS

• Look at the list of built-in modules here: https://www.w3schools.com/nodejs/ref_modules.asp