“Hello World!” with Node.js

This post is based on the “Hello World!” tutorial on the Node.js site [1]. After a couple of days of frustration getting MongoDB configured on my dev box I was overjoyed to find this perfect set of instructions!

1. hello-world.js

Create the hello-world.js file and paste the following code into it. Save the file.

const http = require('node:http');

const hostname = '127.0.0.1';
const port = 3000;

const server = http.createServer((req, res) => {
    res.statusCode = 200;
    res.setHeader('Content-Type', 'text/plain');
    res.end('Hello World!\n');
});

server.listen(port, hostname, () => {
    console.log(`Server running at http://${hostname}:${port}/`);
});

2. Run in PowerShell

Open PowerShell in your project folder.

Enter the command: node hello-world.js

3. Run in the browser

Open your browser at: http://127.0.0.1:3000/

4. hello-world.js HTML

A quick fiddle and you can output some HTML:

const http = require('node:http');

const hostname = '127.0.0.1';
const port = 3000;

const server = http.createServer((req, res) => {
    res.statusCode = 200;
    res.setHeader('Content-Type', 'text/html');
    res.end('<h1>Hello World!</h1>');
});

server.listen(port, hostname, () => {
    console.log(`Server running at http://${hostname}:${port}/`);
});

References:

1. Node.js v22.3.0 documentation (no date) Usage and example | Node.js v22.3.0 Documentation. Available at: https://nodejs.org/docs/latest/api/synopsis.html (Accessed: 26 June 2024).