React Js Convert Positive Number to Negative

<!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 [positiveNumber, setPositiveNumber] = useState(42);
      const [negativeNumber, setNegativeNumber] = useState();

.positive-number {
      font-size: 24px;
      color: #007bff;
      /* Blue color for positive numbers */
    }

.negative-number {
      font-size: 24px;
      color: #dc3545;
      /* Red color for negative numbers */
    }

.convert-button {
      margin-top: 20px;
      padding: 10px 20px;
      font-size: 18px;
      background-color: #28a745;
      /* Green color for the button */
      color: #fff;
      /* White text color */
      border: none;
      border-radius: 5px;
      cursor: pointer;
      transition: background-color 0.3s ease;
    }

.convert-button:hover {
      background-color: #218838;
      /* Darker green color on hover */
    }
  </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 [positiveNumber, setPositiveNumber] = useState(42);
      const [negativeNumber, setNegativeNumber] = useState();
​
      const convertToNegative = () => {
        const newNegativeNumber = -Math.abs(positiveNumber);
        setNegativeNumber(newNegativeNumber);
      };
      return (
        <div className='container'>
          <h3>React Js Convert Positive to Negative Number</h3>
          <p className='positive-number'>Positive Number: {positiveNumber}</p>
          <p className='negative-number'>Negative Number: {negativeNumber}</p>
          <button className='convert-button' onClick={convertToNegative}>Convert to Negative</button>
        </div>
      );
    }
    ReactDOM.render(<App />, document.getElementById("app"));
  </script>
​
  <style>
    .container {
      margin: 0 auto;
      width: 600px;
      text-align: center;
      box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.12), 0 2px 4px 0 rgba(0, 0, 0, 0.24);
      padding: 20px;
    }
​
    .positive-number {
      font-size: 24px;
      color: #007bff;
      /* Blue color for positive numbers */
    }
​
    .negative-number {
      font-size: 24px;
      color: #dc3545;
      /* Red color for negative numbers */
    }
​
    .convert-button {
      margin-top: 20px;
      padding: 10px 20px;
      font-size: 18px;
      background-color: #28a745;
      /* Green color for the button */
      color: #fff;
      /* White text color */
      border: none;
      border-radius: 5px;
      cursor: pointer;
      transition: background-color 0.3s ease;
    }
​
    .convert-button:hover {
      background-color: #218838;
      /* Darker green color on hover */
    }
  </style>
</body>
​
</html>