React Js Change CSS on Button Click

<!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 } = React;
    function App() {
      const [isButtonClicked, setIsButtonClicked] = useState(false);

const handleButtonClick = () => {
        setIsButtonClicked(!isButtonClicked);
      };

return (
        <div className='container'>
          <h3>React Js Change CSS on Button Click Example</h3>
          <button id='clickButton' onClick={handleButtonClick}>
            Click me to change CSS
          </button>
          <div id='content' className={isButtonClicked ? 'clicked' : ''}>
            <p>Click on the button to see changes in CSS</p>
            <span id='status'>{isButtonClicked ? 'Button Clicked' : 'Button Not Clicked'}</span>
          </div>
        </div>
      );
    }
    ReactDOM.render(<App />, document.getElementById("app"));
  </script>
  <style>
    .container {
      max-width: 500px;
      margin: 0 auto;
      padding: 20px;
      border-radius: 8px;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
    }

button#clickButton {
      padding: 10px 20px;
      font-size: 16px;
      background-color: #3498db;
      color: white;
      border: none;
      cursor: pointer;
      transition: background-color 0.3s ease;
    }

button#clickButton:hover {
      background-color: #2980b9;
    }

div#content {
      margin-top: 20px;
      padding: 10px;
      background-color: #ecf0f1;
      border: 1px solid #bdc3c7;
      border-radius: 5px;
      transition: background-color 0.3s ease;
    }

div#content.clicked {
      background-color: #2ecc71;
    }

p {
      font-size: 18px;
      margin: 0;
    }

span#status {
      font-size: 16px;
      font-weight: bold;
    }

div#content.clicked #status {
      color: #fff;
    }
  </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 } = React;
    function App() {
      const [isButtonClicked, setIsButtonClicked] = useState(false);
​
      const handleButtonClick = () => {
        setIsButtonClicked(!isButtonClicked);
      };
​
      return (
        <div className='container'>
          <h3>React Js Change CSS on Button Click Example</h3>
          <button id='clickButton' onClick={handleButtonClick}>
            Click me to change CSS
          </button>
          <div id='content' className={isButtonClicked ? 'clicked' : ''}>
            <p>Click on the button to see changes in CSS</p>
            <span id='status'>{isButtonClicked ? 'Button Clicked' : 'Button Not Clicked'}</span>
          </div>
        </div>
      );
    }
    ReactDOM.render(<App />, document.getElementById("app"));
  </script>
  <style>
    .container {
      max-width: 500px;
      margin: 0 auto;
      padding: 20px;
      border-radius: 8px;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
    }
​
    button#clickButton {
      padding: 10px 20px;
      font-size: 16px;
      background-color: #3498db;
      color: white;
      border: none;
      cursor: pointer;
      transition: background-color 0.3s ease;
    }
​
    button#clickButton:hover {
      background-color: #2980b9;
    }
​
    div#content {
      margin-top: 20px;
      padding: 10px;
      background-color: #ecf0f1;
      border: 1px solid #bdc3c7;
      border-radius: 5px;
      transition: background-color 0.3s ease;
    }
​
    div#content.clicked {
      background-color: #2ecc71;
    }
​
    p {
      font-size: 18px;
      margin: 0;
    }
​
    span#status {
      font-size: 16px;
      font-weight: bold;
    }
​
    div#content.clicked #status {
      color: #fff;
    }
  </style>
</body>
​
</html>