bun — Bun is an all-in-one toolkit for JavaScript and TypeScript apps, featuring a fast runtime, bundler, test runner, and package manager in a single executable.

Bun is an all-in-one toolkit for JavaScript and TypeScript apps, featuring a fast runtime, bundler, test runner, and package manager in a single executable.

About this project

Bun is a comprehensive toolkit designed as a drop-in replacement for Node.js. Written in Rust and powered by JavaScriptCore, it aims to reduce startup times and memory usage. It provides a unified experience by integrating several essential development tools into one `bun` command. Key capabilities include: - **Runtime**: Fast execution of JavaScript and TypeScript (including JSX) out-of-the-box, with support for Web APIs and Node.js compatibility. - **Package Manager**: A high-performance alternative to npm/yarn for installing and managing dependencies. - **Bundler**: Built-in bundling capabilities including minification and Hot Module Replacement (HMR). - **Test Runner**: An integrated testing framework with support for mocks, snapshots, and code coverage. - **Integrated APIs**: Native support for HTTP servers, WebSockets, SQLite, PostgreSQL, Redis, S3, and file I/O. Bun supports Linux, macOS, and Windows, and can be installed via shell scripts, npm, Homebrew, or Docker.