Send additional data on socket connection

Question

How to best send additional data upon socket connection?

Client:

socket.on(\'connect\',function(){ 
//I\'d like set some values and pass them up to t         


        

Answer 1

this is my code on socket version 2.1.1

//client side
var socket = io.connect(window.location.origin,{query:'loggeduser=user1'});

// server side
io.socket.on('connection', function (socket) {
    console.log("loggeduser => " +  socket.handshake.query.loggeduser);
});