Bun

Bun is a fast and modern {{Glossary("JavaScript")}} runtime environment designed to prioritize performance and developer tooling.

Unlike Node.js and Deno, Bun is built on Apple's JavaScriptCore. Notable features of Bun include:

• Drop-in Node.js replacement: almost all Node.js programs can run using Bun-equivalent commands.
• State-of-the-art JavaScript execution speed in most real-world scenarios.
• Native support for JavaScript syntax extensions like JSX and TypeScript.
• Global cache for managing package installations to minimize disk usage.
• Built-in bundler, transpiler, Jest compatible test-runner, package manager, and more built-in utilities that web developers may find useful.

See also

• Bun website