This is a prototype/demo application to showcase a widget that prompts the user if there's an object off screen.
This has not been implemented like a normal ArcGIS widget... it's div map at the bottom right (as prototype).
I think there's a few different ways this could be used, but ultimately I think it's best with:
- Geometry that moves.
- Geometry that is time enabled.
- When data is spawning off screen (e.g. alerts).
The previous application I wrote that works with multiple data in a feature service can be found here.