I've been trying out socket.io and have obviously started with their chat app. The client-side code on their side looks somthing like this:
<!doctype html>
<html>
<head>
<title>Socket.IO chat</title>
<style>
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font: 13px Helvetica, Arial; }
form { background: #000; padding: 3px; position: fixed; bottom: 0; width: 100%; }
form input { border: 0; padding: 10px; width: 90%; margin-right: .5%; }
form button { width: 9%; background: rgb(130, 224, 255); border: none; padding: 10px; }
#messages { list-style-type: none; margin: 0; padding: 0;}
#messages li { padding: 5px 10px; }
#messages li:nth-child(odd) { background: #eee; }
</style>
</head>
<body>
<ul id="messages"></ul>
<form action="" id = "frm">
<input id="m" autocomplete="off" /><button id='b'>Send</button>
</form>
<script src="/socket.io/socket.io.js"></script>
<script src="http://code.jquery.com/jquery-1.11.1.js"></script>
<script>
var socket = io();
$('form').submit(function(){
socket.emit('chat message', $('#m').val());
$('#m').val('');
return false;
});
socket.on('chat message', function(msg){
$('#messages').append($('<li>').text(msg));
});
</script>
</body>
</html>
Now, my problem is that if I try to change the code inside the callback function inside the socket.on block with something like:
document.getElementById('messages').innerHTML += '<li>' + msg + '</li>';
the li element appears, for like half a second, and then the innerHTML resets, the same thing happens if I try editing any other part of the DOM inside the callback ?
I don't use Jquery but common sense made me assume
$('#messages').append($('<li>').text(msg))
; is basically equivalent with modifying the innerHTML in the way I wrote above. What am I doing wrong ? Is socket.io made in such a way that it can only use Jquery inside its call backs ? (I tried this in serveral browser).
