Bun

All-in-one JavaScript runtime, bundler, test runner, and package manager

Bun is a JavaScript runtime built on JavaScriptCore (Safari's engine) instead of V8. It also ships a package manager, bundler, and test runner, so it can replace Node.js, pnpm , Vite , and Jest in a single binary.
Package installs are significantly faster than npm and pnpm due to native resolution and hardlinking. Native TypeScript and JSX support without a build step. Drop-in Node.js compatibility for most packages, though some native modules and Node APIs still have gaps.

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