r 使用操作按钮隐藏/显示复选框

Question

假设我有以下代码...

ui.r

library(shiny)

    ui <- fluidPage(
      actionButton("fishButton", label = "Fish"),
      checkboxGroupInput("Check1",label=h4 ("Fish:"), choices = c("Bass","Shark","Tuna")),
      actionButton("reptileButton", label = "Reptile"),
      checkboxGroupInput("Check2",label=h4 ("Reptile:"), choices = c("Komodo","Skink","Snake")),
      actionButton("mammalButton", label = "Mammal"),
      checkboxGroupInput("Check3",label=h4 ("Mammals:"), choices = c("Dog","Cat","Bear")),
      actionButton("birdButton", label = "Bird"),
      checkboxGroupInput("Check4",label=h4 ("Birds:"), choices = c("Budgie","Parrot","Cockatiel")),
      actionButton("amphibianButton", label = "Amphibian"),
      checkboxGroupInput("Check5",label=h4 ("Amphibian:"), choices = c("Frog","Toad","Salamander"))
    )

有没有办法使用条件面板通过单击相应的 actionButton 来隐藏/显示 checkboxGroups？据我了解，actionButton 仅存储一个从 0 开始并随着按钮的每次单击而增加 1 的整数，这在这种情况下似乎没有多大帮助。是否有可能有一个仅在其 actionButton 值为偶数或类似数字时才显示的条件面板？

Answer 1

您可以使用shinyJS 包：

install.packages("shinyjs")

在用户界面中，将字段初始化为隐藏并在按钮单击时调用切换

ui.R：

library(shiny)
library(shinyjs)

shinyUI(fluidPage(

  shinyjs::useShinyjs(),

  actionButton("fishButton", label = "Fish"),
  hidden(
    checkboxGroupInput("Check1",label=h4 ("Fish:"), choices = c("Bass","Shark","Tuna"))
  )
))

server.R

library(shiny)
library(shinyjs)

shinyServer(function(input, output) {
  observeEvent(input$fishButton, {
    toggle("Check1")
  })
})