Как я могу реактивно обновить активный элемент меню в приложении Shiny с помощью `renderUI`?

Я создаю блестящее приложение, которое динамически создает реактивные элементы bs4Box из фрейма данных. Я хочу сделать эти поля доступными для пользователя, чтобы происходило автоматическое перенаправление на другой элемент меню. Я читал и следил за подобными предыдущими вопросами SO, такими как этот или этот выпуск , но безуспешно. JavaScript-решение , подобное этому, тоже может работать?

Вот моя попытка использовать функцию updatebs4ControlbarMenu:

library(shiny)
#> Warning: package 'shiny' was built under R version 3.6.3
library(shinyWidgets)
#> Warning: package 'shinyWidgets' was built under R version 3.6.3
library(bs4Dash)
#> 
#> Attaching package: 'bs4Dash'
#> The following objects are masked from 'package:shiny':
#> 
#>     column, tabPanel, tabsetPanel, updateTabsetPanel
#> The following object is masked from 'package:graphics':
#> 
#>     box
library(tidyverse)
#> Warning: package 'ggplot2' was built under R version 3.6.3
#> Warning: package 'tibble' was built under R version 3.6.3
#> Warning: package 'tidyr' was built under R version 3.6.3
#> Warning: package 'readr' was built under R version 3.6.3
#> Warning: package 'purrr' was built under R version 3.6.3
#> Warning: package 'dplyr' was built under R version 3.6.3

shinyApp(
  ui = bs4DashPage(
    sidebar_collapsed = FALSE,
    controlbar_collapsed = TRUE,
    enable_preloader = FALSE,
    navbar = bs4DashNavbar(skin = "dark"),
    sidebar = bs4DashSidebar(
      inputId = "sidebarState",
      bs4SidebarMenu(
        id = "sidebr",
        bs4SidebarMenuItem(
          "Tab 1",
          tabName = "tab1"
        ),
        bs4SidebarMenuItem(
          "Tab 2",
          tabName = "tab2"
        )
      )
    ),
    
    bs4DashBody(
      bs4TabItems(
        bs4TabItem(
          tabName = "tab1",
          h1("Welcome!"),
          fluidRow(
            pickerInput(
              inputId = "car",
              label = "Car", 
              choices = row.names(mtcars),
              selected = head(row.names(mtcars), 3),
              multiple = TRUE,
              options = list(
                `actions-box` = TRUE)
            ),
            pickerInput(
              inputId = "gear",
              label = "Gear", 
              choices = unique(mtcars$gear),
              selected = unique(mtcars$gear),
              multiple = TRUE,
              options = list(
                `actions-box` = TRUE)
            )
          ),
          
          fluidRow(
            column(6,
                   uiOutput("uiboxes")
            )
          )
        ),
        
        bs4TabItem(
          tabName = "tab2",
          h4("Yuhuuu! You've been directed automatically in Tab 2!")
        )
      )
    )
  ),
  server = function(input, output, session) {
    
    submtcars <- reactive({
      req(input$car, input$gear)
      mtcars %>% 
        mutate(
          carnames = rownames(mtcars)) %>% 
        filter(
          carnames %in% input$car &
            gear %in% input$gear
        )
    })
    
    
    observeEvent( submtcars(), {
      
      output$uiboxes <- renderUI({
        n_ex <- nrow(submtcars())
        lapply(1:n_ex, FUN = function(j) {
          print(paste("j is ", j))
          bs4Box(
            title = submtcars()$carnames[j],
            width = 12,
            str_c("Number of gears:", submtcars()$gear[j]),
            
            btnID <- paste0("btnID", j),
            
            print(btnID),
            fluidRow(
              column(
                2,
                actionBttn(
                  inputId = btnID,
                  icon("search-plus")
                )
              )
            )
          )
        })
      })
    })
    
    observeEvent( input$btnID , {
      updatebs4ControlbarMenu(
        session,
        inputId = "sidebr",
        selected = "tab2"
      )
      
    })
  }
)
#> 
#> Listening on http://127.0.0.1:5851
#> [1] "j is  1"
#> [1] "btnID1"
#> [1] "j is  2"
#> [1] "btnID2"
#> [1] "j is  3"
#> [1] "btnID3"

^{Created on 2020-12-10 by the reprex package (v0.3.0)}