React

React is a popular open-source JavaScript library for building user interfaces, especially single-page applications (SPAs). Developed and maintained by Facebook, React enables developers to create reusable UI components and efficiently update the user interface in response to data changes.

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🌟 Key Concepts

• Component-Based: Build UIs from small, reusable pieces called components.
• JSX: A syntax extension that lets you write HTML-like code in JavaScript.
• Virtual DOM: React uses a virtual representation of the DOM to optimize updates and rendering.
• Props: Inputs to components for passing data.
• State: Local data storage within components that can change over time.
• Hooks: Functions like useState and useEffect for managing state and side effects in functional components.

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🛠️ Example

import React, { useState } from 'react';

function Counter() {
  const [count, setCount] = useState(0);
  return (
    <div>
      <p>You clicked {count} times</p>
      <button onClick={() => setCount(count + 1)}>
        Click me
      </button>
    </div>
  );
}

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📚 Useful Links

• React Official Docs
• React GitHub
• React Patterns
• Awesome React

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📝 Notes

• React can be used with many frameworks and tools (Next.js, Gatsby, Vite, etc.).
• The React ecosystem includes state management libraries (Redux, Zustand), routing (React Router), and more.
• React Native enables building mobile apps using React.

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