Tailwind CSS vs. StyleX: A real migration with 20 components

The text explores the migration of a component library from Tailwind CSS to StyleX, examining key metrics such as lines of code, CSS output, build time, and migration challenges. StyleX, Meta's internal styling system now open-sourced, offers type-safe style authoring, static CSS extraction, and predictable style composition, but requires more code and setup compared to Tailwind. Tailwind excels in rapid prototyping and boasts a larger ecosystem, while StyleX provides stricter styling guarantees, catching errors earlier through typed style objects. The newer `sx={}` prop syntax in StyleX narrows the gap in developer experience, making the choice between Tailwind and StyleX dependent on project needs rather than syntax alone. The migration revealed that while Tailwind remains superior for speed and ecosystem, StyleX's type safety and correctness are valuable for large, reusable component libraries, especially those backed by design systems.

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