Web Server Example

>npm init

Install Package

Use the npm install command to install the public package http-status-codes

>npm install http-status-codes

Code

Create file "hello-world.js" with source shown.

Keywords:

req
res
require
callback function

//hello-world.js

const
	http = require('http'),
	httpStatusCodes = require('http-status-codes'),
	port = 3000;
	
const createCallbackFct = (req, res) => {
	res.writeHead(httpStatusCodes.OK, {'Content-Type': 'text/html'});
	res.write('<h1>Hello World!</h1>');
	res.end();
}

const listenCallbackFct = () => console.log(`Server started on port: ${port}`);

const server = http.createServer(createCallbackFct);
server.listen(port, listenCallbackFct);

Run

Start the web server

>node hello-world

Open Browser on URL

Open a web browser.
Go to the address bar
Enter "http://localhost:3000/" in the address bar
Or, you can click directly on the url shown here to the right

http://localhost:3000/

Hello World!