Phone Number Validation In React Js

<!DOCTYPE html>
<html>

<body>
    <div id="app"></div>
    <script type="text/babel" data-presets="env,react">
        const { useState } = React;
        function App() {
            const [phoneNumber, setPhoneNumber] = useState('');
            const [isValid, setIsValid] = useState(true);

const handleChange = (e) => {
                setPhoneNumber(e.target.value);
                setIsValid(true);
            };

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

// Regex pattern for validating USA phone numbers
                const phonePattern = /^\+?1?[-.\s]?$?(\d{3})$?[-.\s]?(\d{3})[-.\s]?(\d{4})$/;

if (!phonePattern.test(phoneNumber)) {
                    setIsValid(false);
                    return;
                }

// Phone number is valid, do something with it
                console.log('Phone number:', phoneNumber);
            };

return (
                <form class='container' onSubmit={handleSubmit}>
                    <h3>React Js Validate Phone Number for USA</h3>
                    <input
                        type="text"
                        value={phoneNumber}
                        onChange={handleChange}
                        placeholder="Enter phone number"
                    />
                    {!isValid && <p style={{ color: 'red' }}>Invalid phone number</p>}
                    <button type="submit">Submit</button>
                </form>
            );
        }

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

h3 {
            font-size: 24px;
            margin-bottom: 10px;
        }

input[type="text"] {
            width: 100%;
            padding: 10px;
            font-size: 16px;
            border: 1px solid #ccc;
            border-radius: 4px;
            margin-bottom: 10px;
            box-sizing: border-box;
        }

.container p {
            color: red;
            margin-bottom: 10px;
        }

.container button[type="submit"] {
            padding: 10px 20px;
            background-color: #4CAF50;
            color: white;
            border: none;
            cursor: pointer;
        }
    </style>
</body>

</html>