StyleX: Meta's CSS-in-JS styling system
facebook 2026-07-07 12:27:41
StyleX is a simple, easy-to-use JavaScript syntax and compiler for styling web apps.
StyleX combines the strengths and avoids the weaknesses of both inline styles and static CSS. Defining and using styles requires only local knowledge within a component, and avoids specificity issues while retaining features like Media Queries. StyleX builds optimized styles using collision-free atomic CSS which is superior to what could be authored and maintained by hand.