How do I run your first bun script?

# Hello World with Bun Create `index.ts`: ```typescript console.log('Hello from Bun!'); ``` Run it: ```bash bun run index.ts ``` Bun supports TS/JSX out-of-the-box. Try JSX: ```tsx const Message = () => Hello Bun! ; console.log( ); ``` ```bash bun run index.tsx ``` 77

How do I initialize project & manage packages?

# Create Project ```bash bun init my-app cd my-app ``` Install a package: ```bash bun add cowsay bun add -d typescript @types/node ``` Update `package.json` scripts: ```json "scripts": { "start": "bun run index.ts" } ``` Run: ```bash bun install bun run start bunx cowsay 'Bun rocks!' ``` 77

How do I build a simple http server?

# Web Server with Bun.serve In `server.ts`: ```typescript const server = Bun.serve({ port: 3000, fetch(req) { return new Response('Hello from Bun!'); }, }); console.log(`Listening on http://localhost:${server.port}`); ``` Run: ```bash bun run server.ts ``` Visit http://localhost:3000. Add JSON: ```typescript fetch(req) { const url = new URL(req.url); return Response.json({ hello: url.searchParams.get('name') || 'world' }); } ``` 75

How do I test, bundle & advanced features?

# Add Tests `math.test.ts`: ```typescript import { test, expect } from 'bun:test'; test('adds numbers', () => { expect(1 + 1).toBe(2); }); ``` ```bash bun test ``` # Bundle for Browser ```bash bun build ./index.ts --outdir ./dist --target browser ``` Explore more: SQLite (`bun:sqlite`), hot reload (`--watch`), etc. 77

Master Bun: Fast JS Runtime & Toolkit in 5 Steps

Q: How do I install bun on your system?

# Install Bun Bun is a single executable. Use the official script: **macOS/Linux:** ```bash curl -fsSL https://bun.sh/install | bash ``` Add to PATH if needed: ```bash echo 'export BUN_INSTALL="$HOME/.bun"' >> ~/.zshrc echo 'export PATH="$BUN_INSTALL/bin:$PATH"' >> ~/.zshrc source ~/.zshrc ``` **Windows:** ```powershell powershell -c "irm bun.sh/install.ps1|iex" ``` Verify: ```bash bun --version bun --revision ``` 76 75

🧰

Instant Toolkit

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📋
Step-by-Step Guide

1

Install Bun

Bun is a single executable. Use the official script:

macOS/Linux:

curl -fsSL https://bun.sh/install | bash

Add to PATH if needed:

echo 'export BUN_INSTALL="$HOME/.bun"' >> ~/.zshrc
echo 'export PATH="$BUN_INSTALL/bin:$PATH"' >> ~/.zshrc
source ~/.zshrc

Windows:

powershell -c "irm bun.sh/install.ps1|iex"

Verify:

bun --version
bun --revision
```<citation data-ids="76,75"></citation>

Why this step matters:

-Establishes the foundation for running Bun scripts and tools
-Enables instant access to runtime, bundler, and package manager

15-30 minutes

Terminal/PowerShell, Text Editor, curl (macOS/Linux)

$0

Definition of Done

•bun --version outputs a version number
•bun --revision shows the build revision

Common Mistakes to Avoid

❌ bun command not found after install

→Add ~/.bun/bin to your PATH and source your shell config

❌ Installing on unsupported OS/kernel

→Check macOS 13+, Linux kernel 5.6+, Windows 10 1809+

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🎥
Suggested Videos

Bun Tutorial – JavaScript Runtime (Node.js Alternative) [Full Course]

Bun Crash Course | JavaScript Runtime, Bundler & Transpiler

📚
Learning Resources

📖 Online Courses

Mastering Bun - The Modern Fullstack Development

beginner

Paid

Udemy

📖 Recommended Books

Learn Bun in a Day: The all-in-one blazing fast JavaScript runtime

beginner

by Aleron Sylah

Bun in Practice: The Complete Guide for Developers and Engineers

intermediate

by John Doe

🌐 Helpful Websites

Bun Official Documentation

documentation

Complete guides on runtime, bundler, tests, APIs

Bun GitHub Repository

repository

Source code, examples, and quickstarts

🛠️ Useful Tools

Bun

Runtime

Fast JS/TS runtime, bundler, package manager, test runner

Master Bun: Fast JS Runtime & Toolkit in 5 Steps