react-19

Implement React 19 hooks, React Compiler memoization, and document metadata rendering.

22|3|Updated Jan 10, 2026
One-click install
npx skills add https://github.com/fusengine/agents --skill react-19-fusengine
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: react-19
Source: https://github.com/fusengine/agents/tree/main/plugins/react-expert/skills/react-19
Command: npx skills add https://github.com/fusengine/agents --skill react-19-fusengine

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill helps developers understand and implement the latest features in React 19, ensuring modern, efficient, and performant web applications.

Core Features & Use Cases

  • New Hooks: Implement use(), useOptimistic, useActionState, useEffectEvent for advanced state management and data fetching.
  • React Compiler: Leverage automatic memoization to optimize performance.
  • Document Metadata: Render <title>, <meta>, and <link> tags directly in components for better SEO and social sharing.
  • Use Case: When building a new React application or migrating an existing one, use this Skill to adopt React 19's powerful new APIs for cleaner code and better performance.

Quick Start

Use the react-19 skill to implement the use() hook for data fetching with Suspense.

Frequently Asked Questions about react-19

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I use the use() hook for data fetching with Suspense in React 19?

The use() hook in React 19 allows you to read resources like Promises directly within components, enabling seamless data fetching integration with Suspense boundaries for asynchronous state management.

How does automatic memoization work with the React Compiler?

The React Compiler provides automatic memoization by optimizing performance internally, eliminating the need for manual useMemo and useCallback hooks to maintain efficient web applications.

Can I render document metadata like title and meta tags directly in components?

Yes, React 19 supports component-based document metadata rendering, allowing you to hoist title, meta, and link tags directly within components for improved SEO and social sharing.

What is the best way to implement optimistic UI updates in React 19?

You can implement optimistic UI updates using the useOptimistic hook, allowing you to immediately display expected state changes while asynchronous actions process in the background.

How do I manage form state and actions with useActionState?

The useActionState hook manages form state and submissions, allowing you to handle action results directly within your components for advanced state management without external libraries.

When should I use useEffectEvent for non-reactive logic in React 19?

Use the useEffectEvent hook to extract non-reactive logic that reads the latest props or state without subscribing to them, preventing unnecessary effect re-executions and optimizing performance.