React Js Scroll div to bottom

<!DOCTYPE html>
<html>

<body>
    <div id="app"></div>
    <script type="text/babel">
        const { useRef } = React

function App() {
            const messagesRef = useRef(null);

const messages = [
                { id: 1, text: 'item 1' },
                { id: 2, text: 'item 2' },
                { id: 3, text: 'item 3' },
                { id: 4, text: 'item 4' },
                { id: 5, text: 'item 5' },
                { id: 6, text: 'item 6' },
                { id: 7, text: 'item 7' },
                { id: 8, text: 'item 8' },
                { id: 9, text: 'item 9' }
            ];

const scrollToBottom = () => {
                const container = messagesRef.current;
                container.scrollTop = container.scrollHeight;
            };

return (
                <div className='container'>
                    <h3>React Js Scroll div to bottom</h3>
                    <div className="scrollable" ref={messagesRef}>
                        {messages.map(message => (
                            <div key={message.id} className="message">{message.text}</div>
                        ))}
                    </div>
                    <button onClick={scrollToBottom}>scrollToBottom</button>
                </div>
            );
        }
        ReactDOM.render(<App />, document.getElementById("app"));
    </script>
    <style>
        * {
            box-sizing: border-box;
        }

.container {
            margin: 0 auto;
            width: 500px;
            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;
        }

.scrollable {
            width: 100%;
            max-height: 300px;
            overflow-y: scroll;
            padding: 10px;
            border: 1px solid #ccc;
            border-radius: 5px;
        }

.message {
            background-color: #f2f2f2;
            padding: 10px;
            margin-bottom: 10px;
            border-radius: 5px;
        }

button {
            background-color: #4caf50;
            color: white;
            padding: 10px 20px;
            border: none;
            border-radius: 5px;
            margin-top: 10px;
            cursor: pointer;
        }

button:hover {
            background-color: #45a049;
        }

button:focus {
            outline: none;
        }
    </style>
</body>

</html>