tm_scalebar bg.color argument does not work

[Nowosad]

library(tmap)
tmap_mode("plot")
#> tmap mode set to 'plot'
data(NLD_prov)  

tm_shape(NLD_prov) +
  tm_fill("name") +
  tm_scalebar(bg.color = "black")

[mtennekes]

bg.color is a standard argument for all map components (legends, compass, scalebar, etc). However, it only is used when there is a frame:

tm_shape(NLD_prov) +
	tm_fill("name") +
	tm_scalebar(bg.color = "gold", frame = T)

If you only want to replace the white bar in your scalebar example, you have to use color.light:

tm_shape(NLD_prov) +
	tm_fill("name") +
	tm_scalebar(color.dark = "yellow", color.light = "purple", width = 0.8)

[Nowosad]

Would not it be better if the frame is automatically added when the bg.color is set? Currently, a user can specify the bg.color, but nothing happens...