React Js Conditional Rendering

<!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 [isLoggedIn, setIsLoggedIn] = useState(false);
            const handleLogin = () => {
                setIsLoggedIn(true);
            };

const handleLogout = () => {
                setIsLoggedIn(false);
            };
            return (
                <div className='container'>
                    <h3>React Js Conditonal Rendering</h3>
                    {isLoggedIn ? (
                        <div>
                            <h1>Welcome, User!</h1>
                            <button onClick={handleLogout}>Logout</button>
                        </div>
                    ) : (
                        <div>
                            <h1>Please log in</h1>
                            <button onClick={handleLogin}>Login</button>
                        </div>
                    )}

</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;
            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);
            padding: 20px;
        }

h3 {
            margin-bottom: 20px;
        }

h1 {
            font-size: 24px;
            margin-bottom: 10px;
        }

button {
            padding: 10px 20px;
            font-size: 16px;
            background-color: #4CAF50;
            color: #fff;
            border: none;
            border-radius: 4px;
            cursor: pointer;
        }

button:hover {
            background-color: #45a049;
        }
    </style>
</body>

</html>