How do you count the number of socket.io connections?

Question

JavaScript

How do you count the number of socket.io connections?
Tried to take connect/disconnect events and increase/decrease the counter accordingly
Tried to take the io.engine.clientsCount variable
But there is one problem everywhere - when the page is frequently updated, the counter increases, while the number of connections does not grow. As I understand it, the disconnect event does not have time to be called and the socket thinks that the user is still online.
I understand that you can do some minimal data exchange with users and at the same time determine how many users are alive, but are there any simpler ways?

Answer 1

Write to the event "io.sockets.on connection " - console.log(Object.keys(io.sockets.connected).length);