React Js Detect user switches tabs or leaves the page

<!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, useEffect } = React;

function App() {
            const [message, setMessage] = useState('https://fontawesomicons.com');

useEffect(() => {
                const handleVisibilityChange = () => {
                    if (document.hidden) {
                        // User switched tabs or left the page
                        setMessage('Goodbye, world!');
                    } else {
                        // User came back to the page
                        setMessage('Welcome back!');
                    }
                };

document.addEventListener('visibilitychange', handleVisibilityChange);

return () => {
                    document.removeEventListener('visibilitychange', handleVisibilityChange);
                };
            }, []);

return (
                <div className='container'>
                    <h3>React Js Detect user switches tabs or leaves the page</h3>
                    <p>{message}</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;
        }

.container h3 {
            color: #333;
            font-size: 20px;
            margin-bottom: 10px;
        }

.container p {
            color: #666;
            font-size: 16px;
        }
    </style>
</body>

</html>