First Node.js Application

To create a basic Hello World first application in Node.js, save the following single line JavaScript as hello.js file.

console.log(“Hello James Bond!”);

Open a PowerShell (or command prompt) terminal in the folder in which hello.js file is present, and enter the following command. The “Hello James Bond!” message is displayed in the terminal.

PS D:\nodejs> node hello.js
Hello World
To create a “Hello, World!” web application using Node.js, save the following code as hello.js:

http = require('node:http');
listener = function (request, response) {
 // Send the HTTP header
 // HTTP Status: 200 : OK
 // Content Type: text/html
 response.writeHead(200, {'Content-Type': 'text/html'});

 // Send the response body as "Hello World"
 response.end('<h2 style="text-align: center;">Hello James Bond!</h2>');
};

server = http.createServer(listener);
server.listen(3000);

// Console will print the message
console.log('Server running at http://127.0.0.1:3000/');

Run the above script from command line.
C:\nodejs> node hello.js
Server running at http://127.0.0.1:3000/

The program starts the Node.js server on the localhost, and goes in the listen mode at port 3000. Now open a browser, and enter http://127.0.0.1:3000/ as the URL. The browser displays the Hello World message as desired.

Follow below images.