shiny: start the app with hidden tabs, with NO delay

Question

I would like to build an application and some of the tabs will be hidden to the user until he types the right password. I know how to do this with shinyjs::hideTab

Answer 1

I solved this problem creating a new function (above the UI definition) to include the style="display:none; on the right li tags:

tabsethidepanels<-function(tag, indexes = NULL) {
  if (class(tag) == "shiny.tag" && tag$name == "div" && tag$attribs$class == "tabbable") {
    if (is.null(indexes)) indexes<-seq_along(tag$children[[1]]$children[[1]])
    for (i in indexes) tag$children[[1]]$children[[1]][[i]]$attribs<-c(tag$children[[1]]$children[[1]][[i]]$attribs, list(style="display:none;"))
    tag
  } else stop("tag must be a tabsetPanel!", call. = F)
}

And define the tabset accordingly:

tabsethidepanels(
  tabsetPanel(
    id = "mytab",
    selected = "tab7-not2hide",
    tabPanel("tab1"),
    tabPanel("tab2"),
    tabPanel("tab3"),
    tabPanel("tab4"),
    tabPanel("tab5"),
    tabPanel("tab6"),
    tabPanel("tab7-not2hide")
  ),
  indexes = 1:6
)

The "indexes" field are usefull to select only the right tabs to hide:

<div class="tabbable">
  <ul class="nav nav-tabs shiny-tab-input" id="mytab" data-tabsetid="2818">
    <li style="display:none;">
      <a href="#tab-2818-1" data-toggle="tab" data-value="tab1">tab1</a>
    </li>
    <li style="display:none;">
      <a href="#tab-2818-2" data-toggle="tab" data-value="tab2">tab2</a>
    </li>
    <li style="display:none;">
      <a href="#tab-2818-3" data-toggle="tab" data-value="tab3">tab3</a>
    </li>
    <li style="display:none;">
      <a href="#tab-2818-4" data-toggle="tab" data-value="tab4">tab4</a>
    </li>
    <li style="display:none;">
      <a href="#tab-2818-5" data-toggle="tab" data-value="tab5">tab5</a>
    </li>
    <li style="display:none;">
      <a href="#tab-2818-6" data-toggle="tab" data-value="tab6">tab6</a>
    </li>
    <li class="active">
      <a href="#tab-2818-7" data-toggle="tab" data-value="tab7-not2hide">tab7-not2hide</a>
    </li>
  </ul>
  <div class="tab-content" data-tabsetid="2818">
    <div class="tab-pane" data-value="tab1" id="tab-2818-1"></div>
    <div class="tab-pane" data-value="tab2" id="tab-2818-2"></div>
    <div class="tab-pane" data-value="tab3" id="tab-2818-3"></div>
    <div class="tab-pane" data-value="tab4" id="tab-2818-4"></div>
    <div class="tab-pane" data-value="tab5" id="tab-2818-5"></div>
    <div class="tab-pane" data-value="tab6" id="tab-2818-6"></div>
    <div class="tab-pane active" data-value="tab7-not2hide" id="tab-2818-7"></div>
  </div>
</div>

Remember to select a tab not to hide as active selected = "tab7-not2hide".

If you need to hide all tabs I sugest to create a "blank" tabPanel, select his one as active and hide all tabs with indexes = NULL.

Answer 2

How about this

library(shiny);library(shinyjs)
ui <- fluidPage(useShinyjs(),
                navbarPage("hello", id="hello",
                           tabPanel("home", br(), h3("this is home"),passwordInput("pass", "enter 'password' to see the tabs: "),actionButton("enter", "enter")),
                           tabPanel("tab2",uiOutput("tab2Content")),
                           tabPanel("tab3 with a lot of stuff in it", uiOutput("tab3Content"))))
server <- function(input, output, session) {
  output$tab2Content <- renderUI({
    req(input$pass == "password")
    tagList(
      br(), 
      h4("this is tab2")
    )
  })
  output$tab3Content <- renderUI({
    req(input$pass == "password")
    tagList(
      br(), 
      h4("this is tab3")
    )
  })}
shinyApp(ui, server)

hope this helps!

Answer 3

You could use javascript with extendShinyjs() to hide the tabs you want on page load:

Javascript code:

shinyjs.init = function(){
  $('#hello li a[data-value="tab3_val"]').hide();
  $('#hello li a[data-value="tab2_val"]').hide();
}

R code:

ui <- fluidPage(useShinyjs(),
                #Added this js
                extendShinyjs(script = path_to_javascript_file),
                navbarPage("hello", id="hello",
                           tabPanel("home", br(), h3("this is home"),passwordInput("pass", "enter 'password' to see the tabs: "),actionButton("enter", "enter")),
                           tabPanel("tab2", value = "tab2_val", br(), h4("this is tab2")),
                           tabPanel("tab3 with a lot of stuff in it", value = "tab3_val", br(), h4("this is tab3"))))

server <- function(input, output, session) {

  observeEvent(input$enter, {
    if (input$pass == "password"){
      show(selector = '#hello li a[data-value="tab3_val"]')
      show(selector = '#hello li a[data-value="tab2_val"]')
      }})}
shinyApp(ui, server)

---

Alternatively the CSS actually isn't too complicated. If you wanted to go that route you could simply replace the extendShinyjs() call in the above with:

tags$head(tags$style(HTML("#hello li a[data-value = 'tab2_val'], #hello li a[data-value = 'tab3_val'] {
                             display: none;
 }")))

The downside to this is that the formatting of the tabs appears to be off after un-hiding them.

Answer 4

I'd go with renderUI (see @BertilBaron's answer) or appendTab because it's easy to bypass the password when hiding the tabs:

Here is how to achive the desired behaviour via appendTab avoiding the above with basic shiny, no additional JS:

library(shiny)

ui <- fluidPage(navbarPage("hello", id = "hello",
  tabPanel(
    "home",
    br(),
    h3("this is home"),
    passwordInput("pass", "enter 'password' to see the tabs: "),
    actionButton("enter", "enter")
  )
))

server <- function(input, output, session) {
  observeEvent(input$enter, {
    if (input$pass == "password") {
      appendTab(inputId = "hello", tab = tabPanel("tab2", value = "tab2_val", br(), h4("this is tab2")))
      appendTab(inputId = "hello", tab = tabPanel("tab3 with a lot of stuff in it",value = "tab3_val", br(), h4("this is tab3")))
    }
  })
}

shinyApp(ui, server)