Socket.IO名称空间不起作用

Question

I am trying to make a socket.io node chat room application
And my dependices are
socket.io@1.4.5
node@v5.7.0 At client side I added

window.onload = function(){

        + var socket = io.connect('http://localhost:4000/chat');
        var messagesElement = document.getElementById('messages');
        var lastMessageElement = null;

And the server side I added

- io.sockets.on('connection',function(socket){
   + io.of('/chat').on('connection',function(socket){

Before those changes the application works fine
When I am trying to use socket.io namespaces to
separate different applications on the server and on the client.
It doesn't work and I don't find any error or bug on the console.

My application's repository link

Answer 1

I just found there is a same variable below the socket variable in the client side

        <script>
window.onload = function(){
      + var socket = io.connect('http://localhost:4000/chat');
      var socket = io.connect('/chat');
            var messagesElement = document.getElementById('messages');
            var lastMessageElement = null;

@@ -36,7 +36,7 @@ window.onload = function(){
                lastMessageElement=newMessageElement;
            }
    here--> -var socket = io.connect('http://localhost:4000');
   +//var socket = io.connect('http://localhost:4000');
        socket.on('serverMessage',function(content){
            addMessage(content);
        });

And I comment it, it works now.