React Js Convert String into Title Case

<!DOCTYPE html>
<html>

<body>
    <div id="app"></div>
    <script type="text/babel">
        const { useState, useEffect } = React;
        const App = () => {
            const [title, setTitle] = useState('hello world!');

const toTitleCase = (str) => {
                return str.toLowerCase().replace(/(^|\s|-|\')(\w)/g, (match) => {
                    return match.toUpperCase();
                });
            };

return (
                <div className='container'>
                    <h3>React Js Convert String into Title Case using Regx</h3>
                    <p>String: {title}</p>
                    <p>Title Case String:{toTitleCase(title)}</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;
        }

p {
            font-size: 18px;
            margin-top: 10px;
        }

/* Styles remain unchanged */
    </style>
</body>

</html>