How to minimize a sidebarLayout in a Shiny App? - shiny

Question

I am building a shiny app and I am using two sidebarLayouts. I’m looking for a way to minimize them. I have try put each sidebarLayout into a box.
Example code:
library(shiny)
library(shinyjs)
ui <- fluidPage(
useShinyjs(),
headerPanel("Here goes the heder"),
box(sidebarLayout(
sidebarPanel(textOutput("someinputs")),
mainPanel(textOutput("someoutputs"))),
width = 12,
title = "BB",
collapsible = T,
collapsed = F
)
)
server <- function(input, output) {
output$someinputs <- renderText({
"Here will go the inputs"
})
output$someoutputs <- renderText({
"Here will go the outputs"
})
}
shinyApp(ui, server)
Output:
When I press the collapsible button the Layout does not collapse. Why is this happening? What should I do? Is there other way to do this?

Answer 1

Because you didn't use shinydashboard. The box comes from shinydashboard package. You need to use shinydashboard::dashboardPage instead of fluidPage.
dashboardPage Loads required javascripts and CSS files to toggle the button.
library(shiny)
ui <- shinydashboard::dashboardPage(
shinydashboard::dashboardHeader(),
shinydashboard::dashboardSidebar(),
shinydashboard::dashboardBody(
headerPanel("Here goes the heder"),
shinydashboard::box(
width = 12,
title = "BB",
collapsible = TRUE,
collapsed = FALSE,
sidebarLayout(
sidebarPanel(textOutput("someinputs")),
mainPanel(textOutput("someoutputs")))
)
)
)
If you don't want to use dashboardPage, you can write your own scripts to control the button:
library(magrittr)
library(shiny)
ui <- fluidPage(
headerPanel("Here goes the heder"),
shinydashboard::box(
width = 12,
title = "BB",
collapsible = TRUE,
collapsed = FALSE,
sidebarLayout(
sidebarPanel(textOutput("someinputs")),
mainPanel(textOutput("someoutputs")))
)%>% {.$attribs[['id']] <- 'example-box'; .},
tags$head(tags$script(
"$(document).ready(function(){
$('#example-box button').attr({
'data-toggle':'collapse',
'data-target':'#example-box .box-body',
'aria-expanded':false
})
})"
))
)
I used a hack to assign an ID to the box %>% {.$attribs[['id']] <- 'example-box'; .}, and use some jquery to control the button. Be sure the ID in the script matches the ID you assign in UI, example-box in this case. In javascript, you add # for ID searching, so #example-box.
I wouldn't recommend you to use the second way. You can see in your UI, it's not really a box. It has no border and the button is not at the right place. If you use dashboardPage, you can see the difference.