<script src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/3.0.4/socket.io.js"></script>

Web Ping

<script>

    var socket = io.connect('http://' + document.domain + ':' + location.port);
    var outputDiv = document.getElementById('output');
    var outputLines = [];

    socket.on('stream_output', function(output) {
        outputLines.push(output);
        if (outputLines.length > 10) {
            outputLines.shift();
        }
        outputDiv.innerHTML = outputLines.join('<br>');
    });

    document.getElementById('start-button').addEventListener('click', function() {
        fetch('/start', {method: 'POST'})
            .then(response => response.json())
            .then(data => console.log(data));
    });

    document.getElementById('stop-button').addEventListener('click', function() {
        fetch('/stop', {method: 'POST'})
            .then(response => response.json())
            .then(data => console.log(data));
    });
</script>