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    React

    A JavaScript library for building user interfaces using reusable components and a virtual DOM.

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    Key Takeaways

    • React is used by 40%+ of professional developers, making it the most popular UI library with the largest ecosystem.
    • Component-based architecture enables code reuse, faster development, and easier maintenance across large applications.
    • React's ecosystem (Next.js, React Native, React Query) enables web, mobile, and full-stack development from a single skill set.

    The React Ecosystem

    React itself is just a UI library. Its power comes from the ecosystem built around it:

    • Next.js / Remix: Full-stack frameworks adding SSR, routing, and API routes to React.
    • React Native: Build native iOS and Android apps using React. Share 60-80% of code with web.
    • React Query / SWR: Data fetching and caching libraries that simplify server state management.
    • shadcn/ui / Radix: Accessible, customizable component libraries that accelerate UI development.
    • Zustand / Jotai: Lightweight state management alternatives to Redux for modern React apps.

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