🌐 HTTP Module in Node.js

JavaScript is primarily a client-side scripting language, whereas Node.js allows JavaScript to run on the server side.

JavaScript Flow: Application → Web Browser → Client

Node.js Flow: Application → Server

What is a Module in Node.js?

A module is a chunk of code in an external file that performs a specific task or function. Node modules allow re-use of code in your Node applications.

In some ways, modules are similar to classes in languages like C# or Java.

Default Port Numbers

Node.js applications often listen on port 3000 or 4000, but these are just conventions. You can choose any port.

• Node.js has a built-in HTTP module that allows transferring data over HTTP.
• It provides utilities to create HTTP servers and clients.
• It enables handling of HTTP requests and responses.
• Use http.createServer() to create a server that listens for incoming requests.