bs4Dash: How to disable (remove) dark/light skin switch?

Question

It seems that changing the main background color and also header (navbar) background color in dark mode is not possible. per this link:

• Not able to change bs4Dash "dark" skin theme background in Shiny.

We can always change the sidebar background color in dark (or light using the function for light) mode with this function:

bs4dash_sidebar_dark(
    bg = "", 
),

However, there is no similar function for header.
Therefore, it would be useful to be able to remove or deactivate the dark/light skin switch from the header. I could not find any option to remove this toggle switch. If anyone knows how to do that, it would be highly appreciated.
Here is a simple example code:

library(shiny)
library(bs4Dash)

shinyApp(
  ui = dashboardPage(
    title = "Basic Dashboard",
    header = dashboardHeader(),
    sidebar = dashboardSidebar(),
    controlbar = dashboardControlbar(),
    footer = dashboardFooter(),
    body = dashboardBody()
  ),
  server = function(input, output) {}
)

Answer 1

Set the argument dark = NULL in dashboardPage():

library(shiny)
library(bs4Dash)

shinyApp(
  ui = dashboardPage(
    dark = NULL, 
    
    title = "Basic Dashboard",
    header = dashboardHeader(),
    sidebar = dashboardSidebar(),
    controlbar = dashboardControlbar(),
    footer = dashboardFooter(),
    body = dashboardBody()
  ),
  server = function(input, output) {}
)