Generates a centered placeholder message for empty or loading states in the Shiny UI. Useful for displaying instructions or status messages when no data is available.
ui_placeholder(title, message)shiny.tag div element with centered, styled placeholder content
if (FALSE) { # \dontrun{
output$map_placeholder <- renderUI({
ui_placeholder("No Data Selected", "Please select species from the filter menu.")
})
} # }