README

UnoCSS


The instant on-demand Atomic CSS engine.






💡 I highly recommend reading this blog post - Reimagine Atomic CSSfor the story behind




📚 Documentation |
🧑‍💻 Interactive Docs |
🤹‍♂️ Playground |
🎓 Tutorial



 Features

Inspired by Windi CSS, Tailwind CSS, and Twind, but:

- Fully customizable - no core utilities. All functionalities are provided via presets.
- No parsing, no AST, no scanning, it's INSTANT (5x faster than Windi CSS or Tailwind JIT).
- ~6kb min+brotli - zero deps and browser friendly.
- Shortcuts - aliasing utilities, dynamically.
- Attributify mode - group utilities in attributes.
- Pure CSS Icons - use any icon as a single class.
- Variant Groups - shorthand for group utils with common prefixes.
- CSS Directives - reuse utils in CSS with @apply directive.
- Compilation mode - synthesizes multiple classes into one at build time.
- Inspector - inspect and debug interactively.
- CSS-in-JS Runtime build - use UnoCSS with one line of CDN import.
- VS Code extension
- Code-splitting for CSS - ships minimal CSS for MPA.

 Documentation

Read the documentation for more details.

 Installation

- Vite
- Nuxt
- Astro
- Webpack
- CDN Runtime
- CLI
- VS Code extension
- ESLint Config
- PostCSS

 Acknowledgement

UnoCSS is made possible thanks to the inspirations from the following projects:

 in alphabetical order

- ACSS
- Bootstrap Utilities
- Chakra UI Style Props
- Semantic UI
- Tachyons
- Tailwind CSS
- Twind
- Windi CSS

 Sponsors


  
    
  


 License

MIT License © 2021-PRESENT Anthony Fu