No dashed or dotted grid lines with ggplotly

It seems that ggplotly cannot handle dashed or dotted grid lines. They always default to solid grid lines.

No matter whether I am specifying the general option panel.grid or a specific one like panel.grid.major.y, they always become solid with ggplotly.

library(ggplot2)
library(plotly)

# Dotted and dashed grid lines appear with ggplot2
p <- ggplot(mtcars, aes(disp, mpg)) +
  geom_point() +
  theme(panel.grid = element_line(colour = "red",
                                  linetype = "dotted")) # same issue if "dashed"

p

# However, with ggplotly they become solid
ggplotly(p)

Inizia eseguendo l’esempio R dell’issue con ggplot2 e ggplotly, quindi traccia il modo in cui vengono convertite le impostazioni panel.grid e panel.grid.major.y. Il lavoro è completato quando le linee della griglia tratteggiate e puntinate rimangono tratteggiate o puntinate nell’output di ggplotly, corrispondendo al grafico ggplot2 originale.