downloadButton function

Create a download button or link

Use these functions to create a download button or link; when clicked, it will initiate a browser download. The filename and contents are specified by the corresponding downloadHandler() defined in the server function.

downloadButton(
  outputId,
  label = "Download",
  class = NULL,
  ...,
  icon = shiny::icon("download")
)

downloadLink(outputId, label = "Download", class = NULL, ...)

Arguments

• outputId: The name of the output slot that the downloadHandler

  is assigned to.

• label: The label that should appear on the button.

• class: Additional CSS classes to apply to the tag, if any.

• ...: Other arguments to pass to the container tag function.

• icon: An icon() to appear on the button. Default is icon("download").

Examples

## Not run:

ui <- fluidPage(
  p("Choose a dataset to download."),
  selectInput("dataset", "Dataset", choices = c("mtcars", "airquality")),
  downloadButton("downloadData", "Download")
)

server <- function(input, output) {
  # The requested dataset
  data <- reactive({
    get(input$dataset)
  })

  output$downloadData <- downloadHandler(
    filename = function() {
      # Use the selected dataset as the suggested file name
      paste0(input$dataset, ".csv")
    },
    content = function(file) {
      # Write the dataset to the `file` that will be downloaded
      write.csv(data(), file)
    }
  )
}

shinyApp(ui, server)
## End(Not run)

See Also

downloadHandler()