Add a control to the widget
add_control(deckgl, html, pos = "top-right", style = NULL)A deckgl widget object.
The innerHTML of the element.
The position of the control. Possible values are top-left, top-right,
bottom-right and bottom-left.
A cssText string that will modefiy the default style of the element.
deck <- deckgl() %>%
  add_basemap() %>%
  add_control(
    "<h1>Blank Base Map</h1>",
    pos = "top-right",
    style = "background: #004080; color: white;"
  )
if (interactive()) deck