Programming language: TypeScript
License: MIT License
Tags: Code Design     CSS / Style    
Latest version: v5.2.0

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Start using Aesthetic now! aestheticsuite.dev

Aesthetic is an end-to-end, multi-platform styling and design suite, that offers the following packages.

  • [Compiler](./packages/compiler) - Compiles a design system YAML configuration into Android, iOS, and Web targets -- like Less, Sass, or CSS-in-JS.
  • [Design system](./packages/system) - JavaScript implementation of the design system configuration, with theme and user preference support (color schemes, contrast levels, etc).
  • [Structured style sheets](./packages/sss) - Also known as SSS, it provides a type-safe and structured style sheet format for CSS-in-JS solutions. Provides parsers for local and global scopes.
  • [Style engine](./packages/style) - Low-level API that renders CSS declarations into the DOM using atomic class names and CSS variables for high performance, low filesize, and efficient caching. Also supports server-side rendering and client-side hydration.
  • [Core](./packages/core) - Core API the combines the previous 4 packages into a single but powerful CSS-in-JS solution. Is framework agnostic and can be used within any project.
  • React - React integration that is built on top of the core API. Provides hook and HOC based patterns, with support for contextual themes, directionality, and SSR.


There are many styling solutions that exist, but none of them are perfect. They either offer too little, or too much, are not cross-platform, have complicated APIs, require too much overhead, so on and so forth.

Aesthetic aims to solve all of these problems as streamlined and efficient as possible by delivering on the following goals for both designers and engineers.

  • Designers must be able to contribute. To support this, the design system is configured in YAML, which is easy to learn, read, and write, and works across all operating systems and languages.
  • Configuration and convention. YAML configuration will allow for explicit customizability if needed, otherwise the automated settings will suffice as the common denominator. Ultimately, regardless of which approach is chosen, it will be compiled down to the same design tokens.
  • Mobile first or desktop first. Regardless of what device is being targeted, responsive and adaptive support will be baked into the system, with utilities to effortless integrate it.
  • Multiple design systems can be used in parallel. Through themes, this allows for a migration between old and new designs (2019 vs 2020), without having to modify components or style sheets. For this to work, the theme needs to be strict.
  • Interoping with third-party libraries must be seamless. If a library is written in Aesthetic, and they use our utilities and theme structure, they immediately gain all the benefits of the design system.
  • Support all platforms. Why only support web? Let's support Android and iOS as well, so that the design system is truly universal, and is the source of truth.
  • Support all styling patterns. Use Sass? Or maybe Less? Or you on the CSS-in-JS train? Either way, no matter what pattern your application uses (or maybe multiple patterns), the design system can target all of them.
  • Performance is top priority. Regardless of what platform and target is chosen, performance overhead should be almost non-existant. Aim for zero or low runtime overhead.
  • Developer experience must be enjoyable. Ideally, all Aesthetic APIs and systems are easy to use, easy to learn, and ultimately enjoyable to integrate.
  • Testing is an after-thought. When testing styled components, it will just work. No extra overhead or DOM requirements are necessary. Will also be easy to test class name and style changes based on props.
  • User preference matters. Does the user prefer dark color schemes? Low contrast colors? Reduced motion? The framework will take all this into account, throughout all aspects of the framework.


  • IE 11+
  • APIs
    • Array.from
    • Number.parseFloat
    • Object.assign
    • Object.values
    • matchMedia