My first real, released to the world Experience Builder project was called Park Finder. It was designed for the citizens of Arlington to go in click some filters and find out what parks meet their criteria. Let me give you a quick tour and explain a little about how I made it.
In the lower right of the map, is a custom widget for switching between two basemaps made by importing the Basemap Toggle Widget from the Javascript API. At the time I was working on this project, the Experience Builder Basemap Gallery Widget did not exist and the Basemap Tool had too many choices. Plus, there is a simple elegance to how the Basemap Toggle works. Could I have used multiple maps within my Map Widget to achieve the same effect? Yeah, I guess so, but it was easier to just make my own Widget than to configure multiple maps and all the Actions to make it all work. All in all, I'd rate this custom widget as technically reproducible in Online, but
