Create a Boostrap 4 dashboard main sidebar

bs4DashSidebar(
  ...,
  disable = FALSE,
  width = NULL,
  skin = NULL,
  status = "primary",
  elevation = 4,
  collapsed = FALSE,
  minified = TRUE,
  expandOnHover = TRUE,
  fixed = TRUE,
  id = NULL,
  customArea = NULL
)

updatebs4Sidebar(id, session = shiny::getDefaultReactiveDomain())

bs4SidebarMenu(
  ...,
  id = NULL,
  .list = NULL,
  flat = FALSE,
  compact = FALSE,
  childIndent = TRUE,
  legacy = FALSE
)

bs4SidebarMenuItem(
  text,
  ...,
  icon = NULL,
  badgeLabel = NULL,
  badgeColor = "success",
  tabName = NULL,
  href = NULL,
  newTab = TRUE,
  selected = NULL,
  expandedName = as.character(gsub("[[:space:]]", "", text)),
  startExpanded = FALSE,
  condition = NULL,
  .list = NULL
)

bs4SidebarMenuSubItem(
  text,
  tabName = NULL,
  href = NULL,
  newTab = NULL,
  icon = shiny::icon("angles-right"),
  selected = NULL
)

bs4SidebarHeader(title)

bs4SidebarUserPanel(name, image = NULL)

updatebs4TabItems(
  session = shiny::getDefaultReactiveDomain(),
  inputId,
  selected = NULL
)

dashboardSidebar(
  ...,
  disable = FALSE,
  width = NULL,
  skin = NULL,
  status = "primary",
  elevation = 4,
  collapsed = FALSE,
  minified = TRUE,
  expandOnHover = TRUE,
  fixed = TRUE,
  id = NULL,
  customArea = NULL
)

updateSidebar(id, session = shiny::getDefaultReactiveDomain())

sidebarHeader(title)

sidebarMenu(
  ...,
  id = NULL,
  .list = NULL,
  flat = FALSE,
  compact = FALSE,
  childIndent = TRUE,
  legacy = FALSE
)

sidebarUserPanel(name, image = NULL)

menuItem(
  text,
  ...,
  icon = NULL,
  badgeLabel = NULL,
  badgeColor = "success",
  tabName = NULL,
  href = NULL,
  newTab = TRUE,
  selected = NULL,
  expandedName = as.character(gsub("[[:space:]]", "", text)),
  startExpanded = FALSE,
  condition = NULL,
  .list = NULL
)

menuSubItem(
  text,
  tabName = NULL,
  href = NULL,
  newTab = NULL,
  icon = shiny::icon("angles-right"),
  selected = NULL
)

updateTabItems(
  session = shiny::getDefaultReactiveDomain(),
  inputId,
  selected = NULL
)

if (interactive()) {
  library(shiny)
  library(bs4Dash)

  shinyApp(
    ui = dashboardPage(
      header = dashboardHeader(),
      sidebar = dashboardSidebar(id = "sidebar"),
      body = dashboardBody(
        actionButton(inputId = "sidebarToggle", label = "Toggle Sidebar")
      )
    ),
    server = function(input, output, session) {
      observeEvent(input$sidebar, {
        if (input$sidebar) {
          showModal(modalDialog(
            title = "Alert",
            "The sidebar is opened.",
            easyClose = TRUE,
            footer = NULL
          ))
        }
      })

      observeEvent(input$sidebarToggle, {
        updateSidebar(id = "sidebar", session = session)
      })

      observe({
        print(input$sidebar)
      })
    }
  )
}
if (interactive()) {
  # sidebarItem with conditional value
  library(shiny)
  library(bs4Dash)

  ui <- dashboardPage(
    dashboardHeader(),
    dashboardSidebar(
      sidebarMenu(
        id = "sidebarMenu",
        menuItem(
          text = "Tab 1",
          tabName = "tab1"
        ),
        menuItem(
          condition = "input.show == true",
          text = "Tab 2",
          tabName = "tab2"
        )
      )
    ),
    dashboardBody(
      tabItems(
        tabItem(
          tabName = "tab1",
          h1("Welcome!"),
          checkboxInput("show", "Show Tab 2", FALSE)
        ),
        tabItem(
          tabName = "tab2",
          h1("Hey! You found me!")
        )
      )
    )
  )
  server <- function(input, output) {}
  shinyApp(ui = ui, server = server)
}
## Only run this example in interactive R sessions
if (interactive()) {
  library(shiny)
  library(bs4Dash)

  shinyApp(
    ui = dashboardPage(
      header = dashboardHeader(skin = "dark"),
      body = dashboardBody(
        tabItems(
          tabItem(
            tabName = "tab1",
            sliderInput("obs", "Number of observations:",
              min = 0, max = 1000, value = 500
            ),
            plotOutput("distPlot")
          ),
          tabItem(
            tabName = "tab2",
            checkboxGroupInput(
              "variable", "Variables to show:",
              c(
                "Cylinders" = "cyl",
                "Transmission" = "am",
                "Gears" = "gear"
              )
            ),
            tableOutput("data")
          ),
          tabItem(
            tabName = "tab3",
            checkboxInput("val", "Some value", FALSE),
            textOutput("value")
          ),
          tabItem(
            tabName = "tab4",
            "Nothing special here!"
          ),
          tabItem(
            tabName = "tab5",
            "Tab 5"
          ),
          tabItem(
            tabName = "tab6",
            "Tab 6"
          ),
          tabItem(
            tabName = "tab7",
            "Tab 7"
          )
        )
      ),
      sidebar = dashboardSidebar(
        skin = "light",
        inputId = "sidebarState",
        sidebarMenu(
          id = "sidebar",
          menuItem(
            text = "Tab 1",
            tabName = "tab1",
            icon = icon("van-shuttle")
          ),
          menuItem(
            text = "Tab 2",
            tabName = "tab2",
            icon = icon("shuttle-space"),
            selected = TRUE
          ),
          menuItem(
            text = "Item List 1",
            icon = icon("bars"),
            startExpanded = TRUE,
            menuSubItem(
              text = "Item 3",
              tabName = "tab3",
              icon = icon("circle")
            ),
            menuSubItem(
              text = "Item 4",
              tabName = "tab4",
              icon = icon("circle")
            )
          ),
          menuItem(
            text = "Item List 2",
            icon = icon("bars"),
            startExpanded = FALSE,
            menuSubItem(
              text = "Item 5",
              tabName = "tab5",
              icon = icon("circle")
            ),
            menuSubItem(
              text = "Item 6",
              tabName = "tab6",
              icon = icon("circle")
            )
          ),
          menuItem(
            text = "Tab 7",
            tabName = "tab7",
            icon = icon("house")
          )
        )
      ),
      controlbar = dashboardControlbar(
        skin = "light",
        sliderInput(
          inputId = "controller",
          label = "Update the first tabset",
          min = 1,
          max = 6,
          value = 2
        )
      ),
      footer = bs4DashFooter()
    ),
    server = function(input, output, session) {
      observe(print(input$sidebarItemExpanded))
      observe(print(input$sidebar))

      # update tabset1
      observeEvent(input$controller,
        {
          updateTabItems(
            session,
            inputId = "sidebar",
            selected = paste0("tab", input$controller)
          )
        },
        ignoreInit = TRUE
      )

      output$distPlot <- renderPlot({
        hist(rnorm(input$obs))
      })

      output$data <- renderTable(
        {
          mtcars[, c("mpg", input$variable), drop = FALSE]
        },
        rownames = TRUE
      )

      output$value <- renderText({
        input$val
      })
    }
  )
}