I just got an email touting the new features of ArcGIS Enterprise 10.9.1. It says that the new Map Viewer is now incorporated into ArcGIS Enterprise. I played with the new Map Viewer a few months ago and it wasn't great for some of my older applications, but I thought it would be extremely valuable on a new application we're building in Web AppBuilder. What I liked were the popups that supported a stacked column of information. We were already planning on implementing something vary similar using JavaScript, but I thought this would save us on customization.
My question is do these stacked column popups that you can create in the new Map Viewer required the 4.X JS API to display or can they be displayed in Web AppBuilder using the 3.X JS API.
Happy Thanksgiving!
Nathan