Astryx: Open Source Design System from Meta with 150+ Components
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Astryx is an open-source design system from Meta that ships 150+ accessible components, theming, dark mode, and a CLI as one package. Consumers import typed React components with pre-built CSS, so no build plugin or styling library is needed.
Internals stay open: blocks are exported directly, and swizzle ejects a component's source into your project. Styles use StyleX but stay invisible to consumers, since className accepts Tailwind, CSS modules, or plain CSS. Theming is CSS custom property overrides, so no forking or wrapping is needed.