react-patterns

name	react-patterns
version	2.0.0
description	Comprehensive React 19 patterns expert covering Server Components, Actions, use() hook, useOptimistic, useFormStatus, useFormState, React Compiler, concurrent features, Suspense, and modern TypeScript development. Proactively use for any React development, component architecture, state management, performance optimization, or when implementing React 19's latest features.
language	typescript,javascript,tsx,jsx
framework	react
license	MIT
allowed-tools	Read, Write, Edit, Bash, Grep, Glob
tags	["react","react-19","typescript","javascript","jsx","tsx","hooks","server-components","actions","suspense","concurrent-rendering","react-compiler","use-optimistic","form-actions"]
category	frontend
subcategories	["components","hooks","state-management","performance","server-components","forms","testing"]

React Development Patterns

Expert guide for building modern React 19 applications with new concurrent features, Server Components, Actions, and advanced patterns.

When to Use

• Building React 19 components with TypeScript/JavaScript
• Managing component state with useState and useReducer
• Handling side effects with useEffect
• Optimizing performance with useMemo and useCallback
• Creating custom hooks for reusable logic
• Implementing component composition patterns
• Working with refs using useRef
• Using React 19's new features (use(), useOptimistic, useFormStatus)
• Implementing Server Components and Actions
• Working with Suspense and concurrent rendering
• Building forms with new form hooks

Core Hooks Patterns

useState - State Management

Basic state declaration and updates:

import { useState } from 'react';

function Counter() {
  const [count, setCount] = useState(0);
  
  return (
    <button onClick={() => setCount(count + 1)}>
      Count: {count}
    </button>
  );
}

State with initializer function (expensive computation):

const [state, setState] = useState(() => {
  const initialState = computeExpensiveValue();
  return initialState;
});

Multiple state variables:

function UserProfile() {
  const [name, setName] = useState('');
   [age, setAge] = ();
   [email, setEmail] = ();
  
   (
    
  );
}