In the ArcGIS API 4.0 Beta 2 for JavaScript, how can I listen for the MapView's popup to open or close? Specifically, I need to run code when the user closes the popup. I tried this:
view.popup.on("hide", myFunction);
I tried this:
view.popup.on("blur", myFunction);
But neither of those events seems to exist for a Popup. How do I do it, or is it not possible?