React Js Get Element by Id

<!DOCTYPE html>
<html>

</head>

<body>
  <div id="app"></div>
  <script type="text/babel">
    const { useState, useEffect } = React;

const App = () => {
      function updateElement() {
        const element = document.getElementById('myElementId');

if (element) {
          element.innerHTML = 'Updated content';
          element.style.color = 'red';
        }
      }

return (
        <div className="container">
          <h3>React Js Get Element by id</h3>
          <div id="myElementId">Initial Content</div>
          <button onClick={updateElement}>Update Element</button>
        </div>
      );
    }

ReactDOM.render(<App />, document.getElementById('app'));
  </script>
  <style>
    .container {
      border-radius: 8px;
      box-shadow: 0px 2px 4px rgba(0, 0, 0, 0.1);
      padding: 20px;
      margin: 20px auto;
      max-width: 600px;
      text-align: center;
    }

h3 {
      font-size: 24px;
      color: #333;
    }

#myElementId {
      background-color: #f0f0f0;
      padding: 10px;
      margin: 10px 0;
      border: 1px solid #ccc;
    }

button {
      background-color: #007bff;
      color: #fff;
      padding: 10px 20px;
      border: none;
      cursor: pointer;
    }

button:hover {
      background-color: #0056b3;
    }
  </style>
</body>

</html>

 
<!DOCTYPE html>
<html>
​
<head>
  <meta charset="UTF-8" />
  <script src="https://cdnjs.cloudflare.com/ajax/libs/react/17.0.2/umd/react.development.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/17.0.2/umd/react-dom.development.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/babel-standalone/6.26.0/babel.min.js"></script>
​
</head>
​
<body>
  <div id="app"></div>
  <script type="text/babel">
    const { useState, useEffect } = React;
​
    const App = () => {
      function updateElement() {
        const element = document.getElementById('myElementId');
​
        if (element) {
          element.innerHTML = 'Updated content';
          element.style.color = 'red';
        }
      }
​
      return (
        <div className="container">
          <h3>React Js Get Element by id</h3>
          <div id="myElementId">Initial Content</div>
          <button onClick={updateElement}>Update Element</button>
        </div>
      );
    }
​
    ReactDOM.render(<App />, document.getElementById('app'));
  </script>
  <style>
    .container {
      border-radius: 8px;
      box-shadow: 0px 2px 4px rgba(0, 0, 0, 0.1);
      padding: 20px;
      margin: 20px auto;
      max-width: 600px;
      text-align: center;
    }
​
    h3 {
      font-size: 24px;
      color: #333;
    }
​
    #myElementId {
      background-color: #f0f0f0;
      padding: 10px;
      margin: 10px 0;
      border: 1px solid #ccc;
    }
​
    button {
      background-color: #007bff;
      color: #fff;
      padding: 10px 20px;
      border: none;
      cursor: pointer;
    }
​
    button:hover {
      background-color: #0056b3;
    }
  </style>
</body>
​
</html>