我正在尝试使用shinydashboard设置一个闪亮的应用程序，而且在很大程度上是好运。然而，我遇到了侧边栏行为的怪癖，我认为这是可以避免的，但还没有找到如何避免的方法。

我还可以跨菜单切换到子项，这样就可以从subItemOne跳到subItemThree，这很好。问题在于试图换回来。如果选择了subItemOne，而我尝试转到subItemThree和Back到subItemOne，则无法执行此操作。我必须转到SubItemTwo，然后才能打开SubItemOne。

有什么方法可以更正此设置，以便我可以直接从subItemOne跳到subItemThree(或2和4)，然后再跳回来？

library('shiny')
library('shinydashboard')
# Sidebar #############################
sidebar <- dashboardSidebar(
  width = 290,

  sidebarMenu(
    menuItem('Menu One', tabName = 'menuOne', icon = icon('line-chart'), 
        collapsible = 
            menuSubItem('Sub-Item One', tabName = 'subItemOne'),
            menuSubItem('Sub-Item Two', tabName = 'subItemTwo')
            )
  ),

  sidebarMenu(
    menuItem('Menu Two', tabName = 'menuTwo', icon = icon('users'), 
             collapsible = 
               menuSubItem('Sub-Item Three', tabName = 'subItemThree'),
             menuSubItem('Sub-Item Four', tabName = 'subItemFour')
    )
  )

)
# Body #############################
body <- dashboardBody(

  tabItems(
    tabItem(tabName = 'subItemOne',
            h2('Selected Sub-Item One')
    ),
    tabItem(tabName = 'subItemTwo',
            h2('Selected Sub-Item Two')
    ),
    tabItem(tabName = 'subItemThree',
            h2('Selected Sub-Item Three')
    ),
    tabItem(tabName = 'subItemFour',
            h2('Selected Sub-Item Four')
    )
  )
)
# UI #############################
ui <- dashboardPage(
  dashboardHeader(title = 'Test', titleWidth = 290),
  sidebar,
  body
)
# Server #############################
server <- function(input, output){

}

shinyApp(ui, server)

推荐答案

问题是选项卡项保持活动状态，而单击活动选项卡项不会更新用户界面。这可以通过使用一些Java脚本来修复。

library('shiny')
library('shinydashboard')
# Sidebar #############################
sidebar <- dashboardSidebar(
  tags$head(
    tags$script(
      HTML(
        "
        $(document).ready(function(){
          // Bind classes to menu items, easiet to fill in manually
          var ids = ['subItemOne','subItemTwo','subItemThree','subItemFour'];
          for(i=0; i<ids.length; i++){
            $('a[data-value='+ids[i]+']').addClass('my_subitem_class');
          }

          // Register click handeler
          $('.my_subitem_class').on('click',function(){
            // Unactive menuSubItems
            $('.my_subitem_class').parent().removeClass('active');
          })
        })
        "
      )
    )
  ),
  width = 290,

  sidebarMenu(
    menuItem('Menu One', tabName = 'menuOne', icon = icon('line-chart'),
             collapsible = 
               menuSubItem('Sub-Item One', tabName = 'subItemOne'),
             menuSubItem('Sub-Item Two', tabName = 'subItemTwo')
    )
  ),

  sidebarMenu(
    menuItem('Menu Two', tabName = 'menuTwo', icon = icon('users'), 
             collapsible = 
               menuSubItem('Sub-Item Three', tabName = 'subItemThree'),
             menuSubItem('Sub-Item Four', tabName = 'subItemFour')
    )
  )

)
# Body #############################
body <- dashboardBody(

  tabItems(
    tabItem(tabName = 'subItemOne',
            h2('Selected Sub-Item One')
    ),
    tabItem(tabName = 'subItemTwo',
            h2('Selected Sub-Item Two')
    ),
    tabItem(tabName = 'subItemThree',
            h2('Selected Sub-Item Three')
    ),
    tabItem(tabName = 'subItemFour',
            h2('Selected Sub-Item Four')
    )
  )
)
# UI #############################
ui <- dashboardPage(
  dashboardHeader(title = 'Test', titleWidth = 290),
  sidebar,
  body
)
# Server #############################
server <- function(input, output){

}

shinyApp(ui, server)