test1.html

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<script>
$(document).ready(function(){    
    var url = "ws://nodewebsocketserver.herokuapp.com";
    // var url = "ws://localhost:3000";
    socket = new WebSocket(url);              
    socket.onmessage = function (msg) {          
        var message = JSON.parse(msg.data);
        $('#command').text("time: " + message.time + "  ->  action: " + message.action + ", command: " + message.command + ", url: " + message.url);
        console.log(message)
        if(message.action = "execute_result")
        {
            var resultPacket = {};
            resultPacket.action = "execute_result";
            resultPacket.result = "Success";
            socket.send(JSON.stringify(resultPacket))  
        }
    };
    socket.onopen = function () {
        var message = {};
        message.action = "register_client";  
        message.nick_name = "device_1";
        message.master = false;             
        socket.send(JSON.stringify(message));
    };
})
</script>
<ul id="notes"></ul>
<div id="command"></div>
<div id="newNote">Create a new note</div>
<input type = "button" style = "width: 200px; height: 140px;" value = "Send">