javascript - set username in socket io connection -

i have chat application have handle online users. how can send user name in:

    var myiosocket = io.connect(); 

so can make list @ backend.

currently doing this.

socket.on("connect",function(){             notification.primary('connected');             socket.emit('iamonline',{                 username: $rootscope.username             });         }); 

backend :

var onlineusers = {}; io.sockets.on('connection', function(socket){     socket.on('iamonline',function (data) {         console.log(data.username," connected.")         onlineusers[data.username] = socket;         users[data.username] = socket;         currentuser = data.username;         console.log(socket)         io.sockets.emit("liveusers",object.keys(onlineusers));     });     socket.on('disconnect', function(){         delete onlineusers[currentuser];         console.log(currentuser," disconnected.");         io.sockets.emit("liveusers",object.keys(onlineusers));     }); }); 

i had same issue different project , found out best way query , value on handshake.

server.js

io.on('connection' , function(socket){   if(typeof socket.handshake.name!="undefined"){     user = {       name : socket.handshake.query.name,       id : socket.handshake.query.id,       email : socket.handshake.query.email,     }   } }); 

on client side,

if(typeof io != "undefined"){   var visitor = io.connect('ws://127.0.0.1:8000' , {         'query': $.param({token: '<?=session::$instance->session['id']?>'}) + '&name=<?=session::get("username")?>&id=<?=session::get("id")?>&email=<?=sesion::get("email")?>'   }); }