index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Micro Client-Server App</title>
</head>
<body>
    <button id="getDataBtn">Get Data</button>
    <script src="https://cdn.jsdelivr.net/npm/sweetalert2@10"></script>
    <script src="/socket.io/socket.io.js"></script>
    <script>
        const socket = io();

        document.getElementById('getDataBtn').addEventListener('click', () => {
            socket.emit('getData');
        });

        socket.on('data', (data) => {
        if (data.error) {
            showErrorAlert(data.error);
        } else {
            showSuccessAlert(data);
        }
        });

        socket.on('error', (error) => {
            console.error('Socket error:', error);
            showErrorAlert('Error communicating with the server');
        });


        function showErrorAlert(message) {
            Swal.fire({
                title: 'Error',
                text: message,
                icon: 'error',
                confirmButtonText: 'OK'
            });
        }

        function showSuccessAlert(data) {
            Swal.fire({
                title: 'Data from Server',
                text: JSON.stringify(data),
                icon: 'success',
                confirmButtonText: 'OK'
            });
        }

    </script>
</body>
</html>