Implement React 19 patterns for Next.js App Router Server Components and Actions.
npx skills add https://github.com/tillysoso/mv1 --skill react-patterns-tillysoso
Please help me install this Agent Skill. Skill: react-patterns Source: https://github.com/tillysoso/mv1/tree/main/.claude/skills/react-patterns Command: npx skills add https://github.com/tillysoso/mv1 --skill react-patterns-tillysoso
Building scalable, pattern-rich React 19 apps with Server Components, Server Actions, and concurrency can be error-prone and time-consuming.
Create a Server Component that fetches data and a Client Component that handles a form action using useTransition and Server Actions.
High-intent search queries and answers about installing and using this skill.
Server Actions in the Next.js App Router integrate with useActionState by handling form submissions on the server while managing pending states client-side. This pattern requires proper server/client component boundaries and type-safe validation to ensure secure data mutations.
Optimistic UI in React 19 is handled using the useOptimistic hook to immediately reflect expected state changes before server confirmation. This concurrency pattern pairs with useTransition to manage the actual mutation and roll back on error.
Server and Client Components separation is needed when fetching data securely on the server or executing Server Actions, while requiring Client Components for interactive UI elements using hooks like useTransition, useOptimistic, or useActionState.
The React Compiler optimizes performance by automatically handling memoization for Server Components and Client Components, reducing the need for manual useMemo or useCallback implementations while maintaining optimal render cycles during concurrent updates.
The use() hook can be used to unwrap promises in React 19 components, enabling direct data fetching within Server Components or Suspense boundaries. It allows passing async values deeply through the component tree without manual promise chaining.
Public endpoints with Server Actions face security limitations requiring explicit validation and error handling to prevent unauthorized access. Type-safe validation must be implemented on the server side, as client-side checks alone are insufficient for securing mutations.
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