React Js Email Validation

<!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 [email, setEmail] = useState('');
            const [isValid, setIsValid] = useState(false);
            const [isSubmitted, setIsSubmitted] = useState(false);

const handleInputChange = (e) => {
                setEmail(e.target.value);
                setIsSubmitted(false); // Reset the form submission state
            };

const handleSubmit = (e) => {
                e.preventDefault();

const regex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
                setIsValid(regex.test(email));
                setIsSubmitted(true); // Set the form submission state
            };

return (
                <div className='container'>
                    <h3>React Js Email Validation</h3>
                    <form onSubmit={handleSubmit}>
                        <input
                            type="text"
                            value={email}
                            onChange={handleInputChange}
                            placeholder="Enter your email"
                        />
                        <button type="submit">Validate</button>
                    </form>
                    {isSubmitted && isValid && <p style={{ color: 'green' }}>Email is valid!</p>}
                    {isSubmitted && !isValid && <p style={{ color: 'red' }}>Email is invalid!</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;
        }

input[type="text"] {
            padding: 10px;
            width: 300px;
            border: 1px solid #ccc;
            border-radius: 5px;
            font-size: 16px;
            margin-bottom: 10px;
        }

button[type="submit"] {
            padding: 10px 20px;
            background-color: #4CAF50;
            color: #fff;
            border: none;
            border-radius: 5px;
            font-size: 16px;
            cursor: pointer;
        }

button[type="submit"]:hover {
            background-color: #45a049;
        }

p {
            font-size: 18px;
            margin-bottom: 10px;
        }
    </style>
</body>

</html>