How to get a common handshake between different namespaces in socket.io?

Question

JavaScript

During the application, the same client connects to the server using different namespaces.

var nsp = io.of('/my-namespace');
nsp.use(function (client, next){
    client.handshake.userId = 1;
    next();
});

var nsp2 = io.of('/my-tho');
nsp2.use(function (client, next){
    console.log(client.handshake.userId); // - > undefined
    next();
});

How to get the right handshake in the second case

Answer 1

Through a global variable