actionButton: Bootstrap 4 Action button/link

In DivadNojnarg/bs4Dash: A 'Bootstrap 4' Version of 'shinydashboard'

Bootstrap 4 Action button/link

Description

Creates an action button or link whose value is initially zero, and increments by one each time it is pressed.

Usage

actionButton(
  inputId,
  label,
  icon = NULL,
  width = NULL,
  ...,
  status = NULL,
  gradient = FALSE,
  outline = FALSE,
  size = NULL,
  flat = FALSE
)

Arguments

inputId	The input slot that will be used to access the value.
label	The contents of the button or link–usually a text label, but you could also use any other HTML, like an image.
icon	An optional shiny::icon() to appear on the button.
width	The width of the input, e.g. '400px', or '100%'; see htmltools::validateCssUnit().
...	Named attributes to be applied to the button or link.
status	Button status color. Valid statuses are defined as follows: primary: \Sexpr[results=rd, stage=render]{bs4Dash:::rd_color_tag("#007bff")}. secondary: \Sexpr[results=rd, stage=render]{bs4Dash:::rd_color_tag("#6c757d")}. info: \Sexpr[results=rd, stage=render]{bs4Dash:::rd_color_tag("#17a2b8")}. success: \Sexpr[results=rd, stage=render]{bs4Dash:::rd_color_tag("#28a745")}. warning: \Sexpr[results=rd, stage=render]{bs4Dash:::rd_color_tag("#ffc107")}. danger: \Sexpr[results=rd, stage=render]{bs4Dash:::rd_color_tag("#dc3545")}.
gradient	Whether to apply gradient to color. Default to FALSE.
outline	Whether to display an outline style. Status must not be NULL if TRUE. Default to FALSE.
size	Button size. Default to NULL. Possible choices: c("lg", "sm", "xs").
flat	Whether to apply a flat style. Default to FALSE.

Server value

An integer of class "shinyActionButtonValue". This class differs from ordinary integers in that a value of 0 is considered "falsy". This implies two things:

• Event handlers (e.g., shiny::observeEvent(), shiny::eventReactive()) won't execute on initial load.

• Input validation (e.g., shiny::req(), shiny::need()) will fail on initial load.

Note

One may also pass the status directly via the ... parameter using class = "btn-primary", for the primary status for instance. Same thing for other styles like the size.

See Also

shiny::observeEvent() and shiny::eventReactive()

Examples

## Only run examples in interactive R sessions
if (interactive()) {
 library(shiny)
 library(bs4Dash)

 shinyApp(
  ui = dashboardPage(
    header = dashboardHeader(
      title = bs4DashBrand(
        title = "My dashboard",
        color = "primary",
        src = "https://adminlte.io/themes/v3",
        image = "https://adminlte.io/themes/v3/dist/img/AdminLTELogo.png"
      )
    ),
    sidebar = dashboardSidebar(),
    body = dashboardBody(
      sliderInput("obs", "Number of observations", 0, 1000, 500),
      actionButton(
       "goButton", "Go!",
       status = "danger",
       outline = TRUE,
       flat = TRUE,
       size = "lg"
      ),
     plotOutput("distPlot")
    ),
    controlbar = dashboardControlbar(),
    title = "DashboardPage"
  ),
  server = function(input, output) {
   output$distPlot <- renderPlot({
    # Take a dependency on input$goButton. This will run once initially,
    # because the value changes from NULL to 0.
    input$goButton

    # Use isolate() to avoid dependency on input$obs
    dist <- isolate(rnorm(input$obs))
    hist(dist)
   })
  }
 )

}

## Example of adding extra class values
actionButton("largeButton", "Large Primary Button", class = "btn-primary btn-lg")

DivadNojnarg/bs4Dash documentation built on July 16, 2025, 3:49 p.m.