I have in my app a page which is a kind of collaborative workspace. On this page I like to show the list of logged-in users and if they currently have a focus on this collaborative workspace or not.

In short: I want to track the focus on a certain page. 

Has someone done this before? Or is there a package around? I have found [BenjaminRH/meteor-event-hooks](https://github.com/BenjaminRH/meteor-event-hooks) but this seem have stopped to be supported for 2 years. I have tried it and run in quite bit of problems.