kb/data/developer.mozilla.org/en-US/docs/Glossary/Bun-0.md

title	chunk	source	category	tags	date_saved	instance
Bun - Glossary | MDN	1/3	https://developer.mozilla.org/en-US/docs/Glossary/Bun	reference	web, html, css, javascript, documentation	2026-05-05T05:25:53.462585+00:00	kb-cron

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1. Glossary
2. Bun

Bun

Bun is a fast and modern 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.

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• See also

See also

• Bun website