Description
Describe the problem
When using a page_navbar() together with a nav_menu() and a nav_panel(), the sidebar's toggle arrow remains visible when a dropdown menu is open.
The correct appearance should be as follows.
Reproducible example
library(shiny)
library(bslib)
# Define UI for application that draws a histogram
ui <- page_navbar(
title = "Z-index debug",
nav_menu("Test", nav_panel("Content A", layout_sidebar()))
)
# Define server logic required to draw a histogram
server <- function(input, output) {
}
# Run the application
shinyApp(ui = ui, server = server)
Fix through CSS, any value greater than 1000 (the default) does the trick (link to shinyapps.io)
library(shiny)
library(bslib)
# Define UI for application that draws a histogram
ui <- tagList(
# Add custom CSS to override dropdown menu z-index
# Any value > 1000 works
tags$head(
tags$style(HTML(
"
.dropdown-menu {
--bs-dropdown-zindex: 1001;
}
"
)),
page_navbar(
title = "Z-index debug",
nav_menu(
title = "Test",
nav_panel("Content A", layout_sidebar())
)
)
)
)
# Define server logic required to draw a histogram
server <- function(input, output) {
}
# Run the application
shinyApp(ui = ui, server = server)Session Info
─ Session info ───────────────────────────────────────────────────────────────────────────────────────────────────
setting value
version R version 4.5.0 (2025-04-11)
os Ubuntu 24.04.2 LTS
system x86_64, linux-gnu
ui RStudio
language (EN)
collate C.UTF-8
ctype C.UTF-8
tz Europe/Brussels
date 2025-05-07
rstudio 2025.04.0-daily+401 Mariposa Orchid (desktop)
pandoc 3.1.3 @ /usr/bin/pandoc
quarto 1.6.42 @ /usr/lib/rstudio/resources/app/bin/quarto/bin/quarto
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── Packages attached to the search path.
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