A low-level, high-performance, atomic-based CSS-in-JS style engine.

Usage no npm install needed!

<script type="module">
  import aestheticStyle from 'https://cdn.skypack.dev/@aesthetic/style';


Aesthetic - CSS-in-JS Style Engine

Build Status npm version npm deps

A low-level, high-performance, atomic-based CSS-in-JS solution. Can be used stand-alone but has been designed to power additional abstractions or APIs.

import { createClientEngine } from '@aesthetic/style';

// Instantiate a client side (DOM) engine
const engine = createClientEngine();

// Render a style decleration into individual atomic class names
const className = engine.renderRule({
  '--color': 'black',

  margin: 0,
  padding: '6px 12px',
  textAlign: 'center',
  color: 'var(--color)',
  backgroundColor: 'transparent',
  border: '2px solid #eee',

  ':hover': {
    borderColor: '#fff',

  '@media (max-width: 600px)': {
    display: 'block',
}); // -> a b c d e f g h


  • 5.8kb minified and gzipped (35.4kb original).
  • Atomic based CSS. One declaration per class name.
  • Specificity ranking so the intended property is always rendered.
  • Font faces, keyframes, imports, and other globals are rendered before normal declarations.
  • Media and support queries are grouped and rendered after normal declarations.
  • Media queries are sorted mobile-first.
  • Injection buffering for increased performance and reduced paints.
  • Style declarations support pseudos, attributes, conditional at-rules, and nested declarations.
  • Deterministic or atomic incremental CSS class names.
  • Right-to-left (RTL) integration (with addon).
  • Vendor prefixing for browsers with >= 1% market share (with addon).
  • Unit suffixing for numerical values.
  • First-class CSS variables support.
  • Server-side rendering and client-side hydration.
  • Framework and library agnostic. Can be used stand-alone.


yarn add @aesthetic/style