React V19 Version Introduction

React 19 Introduction

React 19 is the latest version of React, bringing new features and performance improvements. It enhances the developer experience with new hooks, improved server components, and optimized state management.

React 18 vs React 19

• New Hooks: React 19 introduces useOptimistic, useActionState, and useFormStatus for better state handling.
• Improved Server Components: Server components are now more efficient, reducing client-side JavaScript load.
• Enhanced Stylesheet Management: Developers can now control stylesheet precedence for better style handling.
• Actions for Async Operations: Simplifies handling pending states, errors, and optimistic UI updates.
• Performance Boost: Faster rendering and better memory management.

Basic Example in React 19

Here is a simple example of React 19 using the new useOptimistic hook:

            
import React, { useOptimistic } from 'react';

function Counter() {
    const [count, setCount] = useOptimistic(0);
    
    return (
        

            
Count: {count}
             setCount(c => c + 1)}>Increment
        
    );
}