Action button/link
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. |
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., observeEvent(), eventReactive()) won't execute on initial load.
Input validation (e.g., req(), need()) will fail on initial load.
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!", class = "btn-success"),
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)
}
## Example of adding extra class values
actionButton("largeButton", "Large Primary Button", class = "btn-primary btn-lg")
actionLink("infoLink", "Information Link", class = "btn-info")Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.