Frontend report January 2025

tl;dr

  • React 19 introduces Actions for easier state management and new hooks like useOptimistic and useActionState.
  • Ref callbacks in React 19 can now return cleanup functions enabling advanced DOM interactions.
  • Next.js 15.1 supports React 19 with enhanced debugging, smarter error handling, and seamless integration.
  • Transformers.js enables client-side AI tasks like sentiment analysis without server dependencies.
  • Tailwind CSS v4 brings major updates but raises concerns over CSS variable performance and class naming clarity.
sticker #3
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