Node.js

Node.js is a versatile JavaScript runtime environment that enables developers to build servers, web applications, command-line tools, and scripts. It’s free, open-source, and works across different platforms.

To run Node.js files, you initiate them in the Command Line Interface (CLI) of your computer using the command “node filename.js.”

Modules in Node.js

In Node.js, modules are akin to JavaScript libraries—a collection of functions you can integrate into your applications. It has a rich set of built-in modules that can be used without additional installation, covering a wide range of functionalities.

NPM (Node Package Manager)

NPM is the default package manager for Node.js, facilitating the installation, management, and sharing of packages or modules. It hosts thousands of free packages on npmjs.com, expanding the capabilities of Node.js projects.

Using Packages

Packages in Node.js contain all necessary files for a module. Installing packages is straightforward through NPM. For instance, to download the “express” package, you simply use:

npm install express

Once installed, you can include the package in your Node.js application like this:

const express = require(‘express’);