how to get socket.id of a connection on client side?

Question

Im using the following code in index.js

io.on(\'connection\', function(socket){
console.log(\'a user connected\');
console.log(socket.id);
});

Answer 1

You should wait for the event connect before accessing the id field:

With this parameter, you will access the sessionID

socket.id

Edit with:

Client-side:

var socketConnection = io.connect();
socketConnection.on('connect', function() {
  const sessionID = socketConnection.socket.sessionid; //
  ...
});

Server-side:

io.sockets.on('connect', function(socket) {
  const sessionID = socket.id;
  ...
});