Send custom data along with handshakeData in socket.io?

Question

So I have an application running node js with socket.io as a backend and normal javascript as frontend. My application has a login system which currently simply has the clie

Answer 1

This my code for sending query data to nodejs and server.io server client.

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

io.sockets.on('connection', function (socket) {
    var endp = socket.manager.handshaken[socket.id].address;
    console.log("query... " + socket.manager.handshaken[socket.id].query.user);
}