Example 2.2

import React, { useState } from 'react';
import ReactDOM from 'react-dom';

const Modal = ({ isOpen, onClose, children }) => {
  if (!isOpen) return null;

  return ReactDOM.createPortal(
    <div className="modal-overlay">
      <div className="modal">
        <button className="close-button" onClick={onClose}>Close</button>
        {children}
      </div>
    </div>,
    document.getElementById('modal-root')
  );
};

const App = () => {
  const [isModalOpen, setIsModalOpen] = useState(false);

  const openModal = () => {
    setIsModalOpen(true);
  };

  const closeModal = () => {
    setIsModalOpen(false);
  };

  return (
    <div>
      <button onClick={openModal}>Open Modal</button>
      <Modal isOpen={isModalOpen} onClose={closeModal}>
        <h2>Modal Content</h2>
        <p>This is a simple modal</p>
      </Modal>
    </div>
  );
};

ReactDOM.render(<App />, document.getElementById('root'));