<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Flask Web Interface</title>
</head>
<body>
    <h1>Flask Web Interface</h1>
    <button id="sendButton">Send Data to Server</button>
    <p id="response"></p>

    <script>
        document.getElementById("sendButton").addEventListener("click", function() {
            // Send data to server
            fetch('/send_data', {
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json',
                },
                body: JSON.stringify({data: 'Data from client'}),
            })
            .then(response => response.json())
            .then(data => {
                // Handle response from server
                document.getElementById("response").innerHTML = data.message;
            })
            .catch(error => {
                console.error('Error:', error);
            });
        });
    </script>
</body>
</html>
