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Radix UI React component library. Built for frontend developers building modern apps and design systems, it combines fully unstyled, headless primitives with strict WAI-ARIA accessibility so you can craft complex, inclusive interfaces with complete styling freedom, while consistent API design and cross-browser rigor enable scalable component logic without vendor lock-in. Radix UI’s focus on composability and control lets you theme and extend every element to match exact brand requirements—no mandatory opinions, no default styles to override. Trusted by developer teams at Vercel and Supabase, and with 20,000+ GitHub stars, this open-source toolkit ensures every project maintains accessibility, faster development cycles, and long-term maintainability regardless of growth or technology changes.