Front-End Web Development: The Big Nerd Ranch Guide

Hello, World

To introduce you to the world of writing JavaScript outside the browser, you are going to start with a classic Hello, World program. Create a new file named index.js within your chattrbox folder and type the following, which we will explain after you have entered it:

var http = require('http');

var server = http.createServer(function (req, res) {
  console.log('Responding to a request.');
  res.end('<h1>Hello, World</h1>');
});
server.listen(3000);

On the first line, you used Node’s built-in require function to access the http module included with Node. This module provides a number of tools for working with HTTP requests and responses, such as the http.createServer function.

http.createServer takes in one argument, ...