bun

bun command [options]

bun is an all-in-one JavaScript runtime, package manager, bundler, and test runner. It's designed as a drop-in replacement for Node.js with significantly faster startup times and package installation.The tool aims to be a complete toolkit for JavaScript/TypeScript development with performance as a priority.

run file

Execute JavaScript/TypeScript file

Install dependencies from package.json

Add package to dependencies

Remove package

Run tests

Bundle for production

Create new project

Upgrade Bun itself

bunfig.toml

Project-level and global configuration for Bun. Controls package installation behavior, runtime settings, test runner options, and bundler defaults. Searched in the project root directory, or globally at ~/.bunfig.toml.

- Fast JavaScript runtime (using JavaScriptCore)- Built-in TypeScript support- Package manager (npm-compatible)- Bundler (esbuild-compatible)- Test runner- Native web APIs- Hot reloading- SQLite support

- 4x faster npm install- 2-3x faster script execution vs Node.js- Near-instant startup

- Drop-in Node.js replacement (most APIs)- npm package ecosystem- Jest-compatible test runner- ESM and CommonJS support

Not 100% Node.js compatible. Some native modules don't work. Not all npm packages tested. Windows is supported natively since v1.1 (April 2024).

Bun was created by Jarred Sumner and first released in 2021 as a fast all-in-one JavaScript toolkit built on Zig and JavaScriptCore.

node(1), npm(1), deno(1)

Source code · Homepage · Documentation