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bun-development

Guides JavaScript and TypeScript development with the Bun runtime, covering package management, testing, bundling, and Node.js migration.

1|Updated Aug 17, 2025
Search Tags:#typescript#testing#package management#javascript#runtime#bun#bundling
One-click install
npx skills add https://github.com/ratnesh-maurya/mdconverter --skill bun-development-ratnesh-maurya
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: bun-development
Source: https://github.com/ratnesh-maurya/mdconverter/tree/main/.claude/skills/bun-development
Command: npx skills add https://github.com/ratnesh-maurya/mdconverter --skill bun-development-ratnesh-maurya

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve? Developers working with the Bun runtime often lack consolidated guidance on its built-in tooling, native APIs, and migration path from Node.js, leading to slower setup and missed performance opportunities. ## Core Features & Use Cases - Project Setup & Package Management: Initialize projects with bun init, manage dependencies with bun add/remove/update, and use bunx as an npx equivalent. - Built-in Tooling: Use Bun's native test runner (bun test), bundler (bun build), and executable compiler without external tools like Jest or Webpack. - Native APIs: Leverage Bun.file, Bun.serve, Bun.sql (SQLite), and Bun.password for fast file I/O, HTTP/WebSocket servers, and password hashing. - Use Case: Migrating an Express API from Node.js to Bun—replace npm install with bun install, swap Jest for bun test, and rewrite the server with Bun.serve for significantly faster request handling. ## Quick Start Ask the assistant to set up a new Bun project with TypeScript, a test suite, and a basic HTTP server using Bun.serve.

Frequently Asked Questions about bun-development

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I migrate a Node.js project to Bun?▼

Install Bun, delete node_modules and package-lock.json, then run bun install. Update package.json scripts to use bun run and bun test, and add @types/bun as a dev dependency for TypeScript support.

How do I run tests with Bun instead of Jest?▼

Use the built-in bun test command with imports from bun:test, which provides describe, it, expect, mock, and spyOn. It supports watch mode, coverage reports, grep filtering, and most Jest-style matchers without extra configuration.

Does Bun support Node.js APIs and npm packages?▼

Bun supports most Node.js APIs including fs, path, crypto, Buffer, and process globals, plus npm packages via bun install. Some features like require.resolve and setImmediate differ and have Bun-native equivalents.

How do I build a standalone executable with Bun?▼

Run bun build with the --compile flag and an --outfile to produce a single executable. You can cross-compile for other platforms using --target, such as bun-linux-x64 or bun-darwin-arm64.

When should I use Bun.serve instead of Express?▼

Use Bun.serve when you want native HTTP and WebSocket handling with lower overhead than frameworks like Express. For a structured framework on Bun, Elysia is optimized for the runtime.

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