Как сделать модальное окно в React.js?

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import React, { useState } from "react";
import ReactDOM from "react-dom";
import "./styles.css";

const Modal = ({ header = "", text = "", closeModal }) => {
  return (
    <div className="modal">
      <div className="modal-header">
        <h2>{header} </h2>
        <label className="btn-close" onClick={closeModal} aria-hidden="true">
          ×
        </label>
      </div>
      <div className="modal-body">
        <p>{text}</p>
      </div>
      <div className="modal-footer">
        <label className="btn btn-primary" onClick={closeModal}>
          Отлично!
        </label>
      </div>
    </div>
  );
};

const Main = () => {
  const [showModal, setShowModal] = useState(false);

  return (
    <div>
      <button onClick={() => setShowModal(true)}>
        Показать модальное окно
      </button>
      {showModal ? (
        <Modal
          header="Модальное окно"
          text="Текст"
          closeModal={() => setShowModal(false)}
        />
      ) : null}
    </div>
  );
};

class App extends React.Component {
  render() {
    return <Main />;
  }
}

ReactDOM.render(<App />, document.getElementById("container"));

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.modal-header h2 {
  color: #555;
  font-size: 20px;
  font-weight: normal;
  line-height: 1;
  margin: 0;
}

.modal .btn-close {
  color: #aaa;
  cursor: pointer;
  font-size: 30px;
  text-decoration: none;
  position: absolute;
  right: 5px;
  top: 0;
}

.modal {
  background: #fefefe;
  border: 1px solid black;
  border-radius: 5px;
  position: fixed;
  width: 400px;
  top: 50px;
  left: 50%;
  margin-left: -200px;
  z-index: 103;
  background-color: #f2f2f2;
}
.modal-body {
  padding: 20px;
}
.modal-body p {
  margin: 0;
}
.modal-header,
.modal-footer {
  padding: 20px 20px;
}
.modal-header {
  border-bottom: #eaeaea solid 1px;
}
.modal-header h2 {
  font-size: 20px;
  margin: 0;
}
.modal-footer {
  border-top: #eaeaea solid 1px;
  text-align: right;
}
.btn {
  background: #fff;
  border: #555 solid 1px;
  border-radius: 3px;
  cursor: pointer;
  display: inline-block;
  font-size: 14px;
  padding: 8px 15px;
  text-decoration: none;
  text-align: center;
  min-width: 60px;
  position: relative;
}
.btn:hover,
.btn:focus {
  background: #f2f2f2;
}
.btn-primary {
  background: #428bca;
  border-color: #357ebd;
  color: #fff;
}
.btn-primary:hover {
  background: #66a1d3;
}

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import React, { useState, useEffect } from 'react';
import Modal from './Modal';

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

  useEffect(() => {
    if (isModalOpen) {
      document.body.style.overflow = 'hidden';
    } else {
      document.body.style.overflow = 'auto';
    }
  }, [isModalOpen]);

  return (
    
       setIsModalOpen(true)}>Open Modal
      {isModalOpen && (
         setIsModalOpen(false)}>
          Modal Title
          Modal Content
        
      )}
    
  );
}

export default App;