Node.js modules are essential for organizing code and reusing functionality. Here's a guide to understanding and working with them:

What Are Node.js Modules?

A module is a file or directory containing reusable code. Common types include:

  • Core Modules (e.g., fs, path) 📁
  • Third-party Modules (e.g., express, lodash) 🛠️
  • User-defined Modules (custom code) ✏️

Installing Modules

Use npm to install packages:

npm install <package_name>

For example:

  • npm install express to add a web framework
  • npm install moment for date manipulation

Module Management

  • package.json file: Tracks dependencies and scripts 📄
  • node_modules directory: Stores installed packages 📂
  • Tools like npm install or yarn add help manage versions 🔄

Useful Resources

node_js_modules