React Js Convert Character to ASCII Code

<!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 [inputChar, setInputChar] = useState('');
      const [asciiCode, setAsciiCode] = useState(null);

const handleInputChange = (event) => {
        const char = event.target.value;

if (char.length === 1) {
          setInputChar(char);
          setAsciiCode(char.charCodeAt(0));
        } else {
          setInputChar('');
          setAsciiCode(null);
        }
      };

return (
        <div className='container'>
          <h2 className='title'>React Js Character to ASCII Code Converter</h2>
          <input
            type="text"
            className='input'
            placeholder="Enter a character"
            value={inputChar}
            onChange={handleInputChange}
          />
          {asciiCode !== null && (
            <p className='result'>
              The ASCII code for '{inputChar}' is {asciiCode}.
            </p>
          )}
        </div>

);
    }
    ReactDOM.render(<App />, document.getElementById("app"));
  </script>

.title {
      font-size: 24px;
      color: #333;
      margin-bottom: 20px;
    }

.input {
      width: 100%;
      padding: 10px;
      border: 1px solid #ccc;
      border-radius: 5px;
      font-size: 16px;
      margin-bottom: 10px;
      box-sizing: border-box;
    }

.result {
      font-size: 18px;
      color: #007bff;
      margin-top: 10px;
    }
  </style>
</body>

</html>