A client highlighting bug https://github.com/LearnBoost/socket.io/issues/430

client.html

<script src="socket.io/socket.io.js"></script>
<script>
    var heartbeatInterval;
    var heartbeatCount = 0;

    var socket = io.connect('http://192.168.0.110:8088');

    socket.on('connect', function connectFn(data) {
        console.log('connected');
        var heartbeat = function heartbeatFn()
        {
            console.log('sending heartbeat ' + heartbeatCount);
            socket.emit('heartbeat', heartbeatCount);
            heartbeatCount += 1;
        };
        clearInterval(heartbeatInterval);
        heartbeatInterval = setInterval(heartbeat, 1000);
    });

    socket.on('reconnect', function disconnectFn(data) {
        console.log('reconnected');
    });

    socket.on('disconnect', function disconnectFn(data) {
        console.log('disconnected');
        clearInterval(heartbeatInterval);
    });
</script>