React Modernization Master React version upgrades, class to hooks migration, concurrent features adoption, and codemods for automated transformation. When to Use This Skill - Upgrading React applications to latest versions - Migrating class components to functional components with hooks - Adopting concurrent React features (Suspense, transitions) - Applying codemods for automated refactoring - Modernizing state management patterns - Updating to TypeScript - Improving performance with React 18+ features Version Upgrade Path React 16 → 17 → 18 Breaking Changes by Version: React 17: - Event dele…