Feature Request: Function to Recolor Polygons in Shiny without Redrawing them

[mateolangston]

rstudio/leaflet#496
See this issue which has not been resolved for nearly 5 years on leaflet or leaflet.extras

A function to updatePolygons() would be wonderful to be able to change the fillColor without redrawing the entire polygon.

Another possibility would be to integrate this with Timeslider so that it can handle Polygons and not just Points

[tim-salabim]

I started on something like that a while ago in https://github.com/r-spatial/leafem/blob/master/R/addLayerSelector.R
See e.g. https://fosstodon.org/@tim_salabim/109930450935451917 for a very basic demo. It's functional, but not very flexible at this stage

[trafficonese]

This seems indeed very useful, but I dont think leaflet.extras2 is the place to incorporate that.
Especially since a lot of work was already put into this.
I think this should be adressed in leaflet itself and there are already some PR's or examples on how to implement it yourself.