React Js Convert Decimal to Hexadecimal

<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
  <script src="https://unpkg.com/react@17.0.2/umd/react.development.js"></script>
  <script src="https://unpkg.com/react-dom@17.0.2/umd/react-dom.development.js"></script>
  <script src="https://unpkg.com/@babel/standalone@7.14.7/babel.min.js"></script>
</head>
<body>
  <div id="app"></div>
  <script type="text/babel">
    const { useState } = React;
    function App() {
      const [decimalInput, setDecimalInput] = useState('14');
      const [hexadecimalOutput, setHexadecimalOutput] = useState('');

return (
        <div className='container'>
          <h1>React Js Decimal to Hexadecimal Converter</h1>
          <input
            type="text"
            placeholder="Enter a decimal number"
            value={decimalInput}
            onChange={(e) => setDecimalInput(e.target.value)}
          />
          <button onClick={convertToHexadecimal}>Convert</button>
          <div>
            <strong>Hexadecimal:</strong> {hexadecimalOutput}
          </div>
        </div>
      );
    }

ReactDOM.render(<App />, document.getElementById("app"));
  </script>
  <style>
    .container {
      text-align: center;
      margin: 50px auto;
      padding: 20px;
      width: 600px;
      border-radius: 5px;
      box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    }

input {
      width: 100%;
      padding: 10px;
      margin: 10px 0;
      border-radius: 5px;
      border: 1px solid #ccc;
      box-sizing: border-box;
    }

button {
      padding: 10px 20px;
      background-color: #007bff;
      color: #fff;
      border: none;
      border-radius: 5px;
      font-size: 16px;
      cursor: pointer;
      transition: background-color 0.3s;
      margin-bottom:10px
    }

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

</html>