leaflet.extra2 addSidebyside does not display basemap when is embedded in R Markdown about leaflet.extras2 HOT 5 CLOSED

r-spatial/mapview#349 also contains a link to an issue opened with the markdown people...

from leaflet.extras2.

Hey, indeed thats very interesting, but I am not sure if that is really a leaflet.extras2 bug. It seems that Tiles on a certain pane dont work.
Removing all leaflet.extras2 code, the problem still appears.

---
title: "demo_01"
output: html_document
---

```{r}
library(sp)
library(leaflet)

leaflet(quakes) %>%
  addMapPane("right", zIndex = 0) %>%
  addTiles(group = "base", layerId = "baseid",
           options = pathOptions(pane = "right"))
```

from leaflet.extras2.

Great, thank you @tim-salabim , I knew that issue came up already somewhere, but didnt remember where.

from leaflet.extras2.

Thanks @trafficonese and @tim-salabim for your clues ✌️ ✌️. Finally I was able to solve the problem ... partially. Unfortunately, my knowledge in JS is limited to fully understand the problem, but it seems that there is a conflict between leaflet-side-by-side and this line of code in markdown.
https://github.com/rstudio/rmarkdown/blob/433e726ff5aee9cd14a285f756af814c44929c8d/inst/rmd/h/default.html#L212

If I remove it, leaflet.extra2 and mapview will work perfectly! :)

https://github.com/csaybar/rmarkdown/blob/193047afab503399f57c414bad30054c39e1ebcd/inst/rmd/h/default.html#L213

See this reproducible example:

Install rmarkdown

remotes::install_github("csaybar/rmarkdown")

** Run the demo **
sidebar.Rmd.zip

Any idea how to finally solve this bug 🐛?

from leaflet.extras2.

This should work now with the current dev version of leaflet, thanks to this PR rstudio/leaflet#770

from leaflet.extras2.