Bun.js

All-in-one JavaScript/TypeScript toolkit: runtime, package manager, bundler, test runner.

Quick Reference

# Runtime
bun run index.ts          # Execute file (TS/JSX native)
bun --watch index.ts      # Watch mode
bun --hot index.ts        # Hot reload

# Package Manager
bun install               # Install deps (25x faster than npm)
bun add <pkg>             # Add dependency
bun add -d <pkg>          # Add dev dependency
bun remove <pkg>          # Remove dependency
bun update                # Update deps
bunx <pkg>                # Execute package (like npx)