Hi,
In GoJS, Is it possible to use RxJS Observable | RxJS API Document for observing Diagram object or Diagram.model or Iterators in GoJS?
I don’t know enough about the other library to say, sorry.
Depending on what you want to do, I suggest using the typical GoJS events to observe changes:
http://gojs.net/latest/intro/events.html
http://gojs.net/latest/intro/changedEvents.html
Simon