actionButton {shiny} | R Documentation |
Creates an action button or link whose value is initially zero, and increments by one each time it is pressed.
actionButton(inputId, label, icon = NULL, width = NULL, ...) actionLink(inputId, label, icon = NULL, ...)
inputId |
The |
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 |
width |
The width of the input, e.g. |
... |
Named attributes to be applied to the button or link. |
observeEvent
and eventReactive
Other input elements: checkboxGroupInput
,
checkboxInput
, dateInput
,
dateRangeInput
, fileInput
,
numericInput
, passwordInput
,
radioButtons
, selectInput
,
sliderInput
, submitButton
,
textAreaInput
, textInput
,
varSelectInput
## Only run examples in interactive R sessions if (interactive()) { ui <- fluidPage( sliderInput("obs", "Number of observations", 0, 1000, 500), actionButton("goButton", "Go!"), plotOutput("distPlot") ) 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) }) } shinyApp(ui, server) }