visibilityFuncs: Display/hide an element
In shinyjs: Easily Improve the User Experience of Your Shiny Apps in Seconds

Description Usage Arguments Details Note See Also Examples

Display or hide an HTML element.

show makes an element visible, hide makes an element invisible, toggle displays the element if it it hidden and hides it if it is visible.

showElement, hideElement, and toggleElement are synonyms that may be safer to use if you're working with S4 classes (since they don't mask any existing S4 functions).

If condition is given to toggle, that condition will be used to determine if to show or hide the element. The element will be shown if the condition evaluates to TRUE and hidden otherwise. If you find yourself writing code such as if (test()) show(id) else hide(id) then you can use toggle instead: toggle(id = id, condition = test()).

show(
  id = NULL,
  anim = FALSE,
  animType = "slide",
  time = 0.5,
  selector = NULL,
  asis = FALSE
)

showElement(
  id = NULL,
  anim = FALSE,
  animType = "slide",
  time = 0.5,
  selector = NULL,
  asis = FALSE
)

hide(
  id = NULL,
  anim = FALSE,
  animType = "slide",
  time = 0.5,
  selector = NULL,
  asis = FALSE
)

hideElement(
  id = NULL,
  anim = FALSE,
  animType = "slide",
  time = 0.5,
  selector = NULL,
  asis = FALSE
)

toggle(
  id = NULL,
  anim = FALSE,
  animType = "slide",
  time = 0.5,
  selector = NULL,
  condition = NULL,
  asis = FALSE
)

toggleElement(
  id = NULL,
  anim = FALSE,
  animType = "slide",
  time = 0.5,
  selector = NULL,
  condition = NULL,
  asis = FALSE
)

`id`	The id of the element/Shiny tag
`anim`	If `TRUE` then animate the behaviour
`animType`	The type of animation to use, either `"slide"` or `"fade"`
`time`	The number of seconds to make the animation last
`selector`	JQuery selector of the elements to show/hide. Ignored if the `id` argument is given. For example, to select all span elements with class x, use `selector = "span.x"`
`asis`	If `TRUE`, use the ID as-is even when inside a module (instead of adding the namespace prefix to the ID).
`condition`	An optional argument to `toggle`, see 'Details' below.

If you want to hide/show an element in a few seconds rather than immediately, you can use the delay function.

If you use S4 classes, you should be aware of the fact that both S4 and shinyjs use the show() function. This means that when using S4, it is recommended to use showElement() from shinyjs, and to use methods::show() for S4 object.

shinyjs must be initialized with a call to useShinyjs() in the app's ui.

useShinyjs, runExample, hidden, delay

if (interactive()) {
  library(shiny)

  shinyApp(
    ui = fluidPage(
      useShinyjs(),  # Set up shinyjs
      actionButton("btn", "Click me"),
      textInput("text", "Text")
    ),
    server = function(input, output) {
      observeEvent(input$btn, {
        # Change the following line for more examples
        toggle("text")
      })
    }
  )
}
## Not run: 
  # The shinyjs function call in the above app can be replaced by
  # any of the following examples to produce similar Shiny apps
  toggle(id = "text")
  delay(1000, toggle(id = "text")) # toggle in 1 second
  toggle("text", TRUE)
  toggle("text", TRUE, "fade", 2)
  toggle(id = "text", time = 1, anim = TRUE, animType = "slide")
  show("text")
  show(id = "text", anim = TRUE)
  hide("text")
  hide(id = "text", anim = TRUE)

## End(Not run)

## toggle can be given an optional `condition` argument, which
## determines if to show or hide the element
if (interactive()) {
  shinyApp(
    ui = fluidPage(
      useShinyjs(),
      checkboxInput("checkbox", "Show the text", TRUE),
      p(id = "element", "Watch what happens to me")
    ),
    server = function(input, output) {
      observe({
        toggle(id = "element", condition = input$checkbox)
      })
    }
  )
}