React Js Validate Ip Address

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/react/17.0.2/umd/react.production.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/17.0.2/umd/react-dom.production.min.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 [ipAddress, setIPAddress] = useState('');
            const [isValid, setIsValid] = useState(true);

const handleChange = (event) => {
                setIPAddress(event.target.value);
                setIsValid(true);
            };

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

// Regular expression to validate IP address
                const ipRegex = /^([0-9]{1,3}\.){3}[0-9]{1,3}$/;

if (!ipRegex.test(ipAddress)) {
                    setIsValid(false);
                    return;
                }

// IP address is valid
                // Do something with the valid IP address
                alert('Valid IP address: ' + ipAddress);
            };

return (
                <div className='container'>
                    <h3>React Js Validate Ip Address</h3>
                    <form onSubmit={handleSubmit}>
                        <label>
                            IP Address:
                            <input type="text" value={ipAddress} onChange={handleChange} />
                        </label>
                        <button type="submit">Submit</button>
                        {!isValid && <p style={{ color: 'red' }}>Invalid IP address</p>}
                    </form>
                </div>
            );
        }

ReactDOM.render(<App />, document.getElementById("app"));
    </script>
    <style>
        * {
            box-sizing: border-box;
        }

body {
            font-family: Arial, sans-serif;
            margin: 0;
            padding: 0;
        }

.container {
            margin: 0 auto;
            width: 600px;
            padding: 20px;
            display: flex;
            align-items: center;
            flex-direction: column
        }

h3 {
            text-align: center;
            margin-bottom: 20px;
        }

form {
            display: flex;
            flex-direction: column;
            align-items: center;
        }

label {
            margin-bottom: 10px;
        }

input[type="text"] {
            padding: 8px;
            border: 1px solid #ccc;
            border-radius: 4px;
            width: 100%;
        }

button[type="submit"] {
            padding: 8px 16px;
            background-color: #4caf50;
            color: white;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            margin-top: 10px;
        }

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

p {
            margin-top: 10px;
            font-size: 14px;
        }
    </style>
</body>

</html>