How do I create a Leaflet Proxy in observeEvent() for checkboxGroup in R Shiny
问题 I'm a bit new to R Shiny, and I'm trying to make a simple, dynamic web map in which common users can find where to recycle a variety of materials in Eastern Kentucky. In my sidebar panel in the UI, I made a checkboxGroup, so the user can filter through the recycling centers that allows for the recycling of the materials of their choosing (in this case, which centers recycle glass AND/OR aluminum AND/OR plastics). The checkbox shows up when you run the app, but I get a blank dashboard where