React Js Month Picker

<!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 months = [
        'January', 'February', 'March', 'April', 'May', 'June',
        'July', 'August', 'September', 'October', 'November', 'December'
      ];
      const [selectedMonth, setSelectedMonth] = useState('');
      const handleMonthChange = (e) => {
        const selected = e.target.value;
        setSelectedMonth(selected);
      };
      return (
        <div className='container'>
          <h3 className='heading'>React Js Month Picker</h3>
          <select className='select-box' value={selectedMonth} onChange={handleMonthChange}>
            <option className='option' value="">Select Month</option>
            {months.map((month, index) => (
              <option key={index} className='option' value={month}>
                {month}
              </option>
            ))}
          </select>
          <p className='selected-month'>Selected Month : {selectedMonth}</p>
        </div>

);
    }

ReactDOM.render(<App />, document.getElementById('app'));
  </script>
  <style>
    .container {
      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);
      width: 600px;
      margin: 0 auto;
      padding: 20px;
    }

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

.select-box {
      width: 100%;
      padding: 10px;
      font-size: 16px;
      border: 1px solid #ccc;
      border-radius: 5px;
      background-color: #fff;
      outline: none;
    }

.option {
      font-size: 16px;
    }

.selected-month {
      margin-top: 20px;
      font-size: 18px;
      color: #555;
    }
  </style>
</body>

</html>