How do I install bun and verify setup?

# Install Bun Bun is a single executable. Use these exact commands based on your OS: ## macOS / Linux ```bash curl -fsSL https://bun.sh/install | bash ``` Reload your shell: `source ~/.bashrc` or restart terminal. ## Windows ```powershell powershell -c "irm bun.sh/install.ps1|iex" ``` Add to PATH if needed and restart terminal. Verify: ```bash bun --version bun --revision ``` Create `hello.js`: ```javascript console.log('Hello from Bun!'); ``` Run: `bun run hello.js`

How do I run scripts and explore runtime?

# Basic Runtime Usage Bun runs JS, TS, JSX out-of-the-box. Create `index.ts`: ```typescript const server = Bun.serve({ port: 3000, fetch() { return new Response('Hello from Bun!'); }, }); console.log(`Listening on http://localhost:${server.port}`); ``` Run: `bun run index.ts` Visit http://localhost:3000. Stop with Ctrl+C. Explore CLI: - `bun run script.ts` - Run files - Supports watch: `bun --watch run index.ts`

How do I master package management?

# Init Project and Install Packages `bun init` - Creates package.json, tsconfig.json, bun.lockb. ```bash bun init my-app cd my-app bun add express bun remove express # later ``` `bun install` installs from package.json. Run scripts from package.json: `bun run dev`. Global: `bun add -g typescript`. Lockfile: bun.lockb tracks exact versions.

How do I test and bundle your code?

# Testing and Bundling Add test: `tests/index.test.ts` ```typescript import { test, expect } from 'bun:test'; test('math', () => { expect(1 + 1).toBe(2); }); ``` Run: `bun test`. Bundle: ```bash bun build ./index.ts --outdir ./dist --target bun bun run ./dist/index.js ``` Supports minify, sourcemap.

How do I build a full-stack http app?

# Complete Project: REST API with SQLite `bun init api` `bun add elysia @elysiajs/bun` `index.ts`: ```typescript import { Elysia } from 'elysia'; import { bun } from '@elysiajs/bun'; const app = new Elysia() .use(bun()) .get('/', () => 'Bun API!') .listen(3000); console.log(`http://localhost:${app.server?.port}`); ``` `bun run index.ts` Add SQLite: `bun add drizzle-orm bun:sqlite` Test endpoints. Deploy later via bun build.

Master Bun: Fast JS Runtime & Toolkit in 5 Steps

🧰

Instant Toolkit

2 artifacts

📋
Step-by-Step Guide

1

Install Bun

Bun is a single executable. Use these exact commands based on your OS:

macOS / Linux

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

Reload your shell: source ~/.bashrc or restart terminal.

Windows

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

Add to PATH if needed and restart terminal.

Verify:

bun --version
bun --revision

Create hello.js:

console.log('Hello from Bun!');

Run: bun run hello.js

Why this step matters:

-Establishes your development environment quickly
-Enables running JS/TS scripts without Node.js setup

15-30 minutes

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

$0

Definition of Done

•bun --version outputs current version
•Successfully runs a hello world script

Common Mistakes to Avoid

❌ Command not found after install

→Reload shell with source ~/.bashrc or add ~/.bun/bin to PATH

❌ Wrong installer for OS

→Use Linux/mac command for macOS, PowerShell for Windows

2

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Suggested Videos

Bun Crash Course | JavaScript Runtime, Bundler & Transpiler

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

📚
Learning Resources

📖 Online Courses

Mastering Bun - The Modern Fullstack Development

beginner

Paid

Udemy

📖 Recommended Books

Bun.js in Action: Real-World Solutions for Building Modern Backends

intermediate

by Unknown

🌐 Helpful Websites

Bun Official Documentation

documentation

Complete guides on runtime, bundler, testing, APIs

Bun GitHub Repository

documentation

Source code, releases, examples in README

🛠️ Useful Tools

Bun

Runtime

All-in-one JavaScript runtime, bundler, package manager, test runner

Master Bun: Fast JS Runtime & Toolkit in 5 Steps