React Js Handling Multiple Inputs with a Single onChange Handler

<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8" />
  <script crossorigin src="https://unpkg.com/react@18/umd/react.development.js"></script>
  <script crossorigin src="https://unpkg.com/react-dom@18/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 [formData, setFormData] = useState({
        firstName: '',
        lastName: '',
        email: '',
      });

const handleChange = (event) => {
        const { name, value } = event.target;
        setFormData({
          ...formData,
          [name]: value,
        });
      };

return (
        <div className='container'>
          <h3> React Js Handling Multiple Inputs with a Single onChange Handler</h3>
          <form onSubmit={handleSubmit}>
            <input
              type="text"
              name="firstName"
              value={formData.firstName}
              onChange={handleChange}
              placeholder="First Name"
            />
            <input
              type="text"
              name="lastName"
              value={formData.lastName}
              onChange={handleChange}
              placeholder="Last Name"
            />
            <input
              type="email"
              name="email"
              value={formData.email}
              onChange={handleChange}
              placeholder="Email"
            />
            <button type="submit">Submit</button>
          </form>

</div>

);
    }

const root = ReactDOM.createRoot(document.getElementById('app'));
    root.render(<App />);
  </script>
  <style>
    /* Styling for the container */
    .container {
      max-width: 800px;
      margin: 0 auto;
      padding: 20px;
      font-family: Arial, sans-serif;
      box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.12), 0 2px 4px 0 rgba(0, 0, 0, 0.24);
    }
    form {
      display: flex;
      flex-direction: column;
    }

input {
      margin-bottom: 16px;
      padding: 10px;
      border: 1px solid #ccc;
      border-radius: 4px;
      font-size: 16px;
    }

button {
      padding: 12px 20px;
      border: none;
      border-radius: 4px;
      background-color: #007bff;
      color: #fff;
      font-size: 18px;
      cursor: pointer;
      transition: background-color 0.3s ease;
    }

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

</html>