Node.js

Node.js is a JavaScript runtime that lets you run JavaScript outside the browser. It is commonly used for backend apps, scripts, and command-line tools.

Prerequisites

• Install Node.js (LTS recommended): https://nodejs.org
• Verify installation:

node -v
npm -v

Folder Overview

This nodejs folder contains learning material and hands-on CLI examples:

• 00_Introduction/ - basic Node.js starter content
• 01_Modules/ - notes and examples for core, custom, and third-party modules
• cli-2026/ - focused CLI practice series

cli-2026

cli-2026 is organized as a step-by-step CLI learning track.

1) 00_Intro

Purpose:

• Introduces executable Node scripts using a shebang (#!/usr/bin/env node)
• Prints a welcome message from index.js

Current package behavior:

• Package name: bui
• Bin command: bui

Run locally:

cd cli-2026/00_Intro
npm install
npm start

2) 01_args

Purpose:

• Demonstrates command-line argument parsing with process.argv
• Shows full argv and sliced arguments (process.argv.slice(2))

Current package behavior:

• Bin command is also bui in this lesson

Run locally:

cd cli-2026/01_args
npm install
node index.js hello world

3) projects/00_clrs

Purpose:

• Builds terminal text styling utilities using ANSI escape codes
• Includes reusable helpers for:
  • text colors (utils/colors.utils.js)
  • text styles (utils/styles.utils.js)
  • background colors (utils/backgrounds.utils.js)
  • combined formatter (utils/format.utils.js)

Run locally:

cd cli-2026/projects/00_clrs
npm install
node index.js

4) projects/02_mini_cli_frmwk

Purpose:

• A mini CLI framework that supports basic utility commands

• Implemented commands:

• version / --v - reads version from local package.json

• clear / cls - clears terminal screen

• ls - lists files and folders in the current working directory

• lsd - lists only directories in blue text

Run locally:

cd cli-2026/projects/02_mini_cli_frmwk
npm install
npm link
mini-cli version
mini-cli ls
mini-cli lsd

License

MIT License

Copyright (c) Saqib Bedar