Popups using shiny

Mike Source

I'd like to make a simple popup that prompts users to select files. I've found shiny, but am not sure how to adapt the code. The prompts should be:

  1. "Please select data file". The user selects an excel file
  2. "Please select settings file". Another excel file.
library(shiny)
ui = fluidPage(
  actionButton("show", "Show")
)
server = function(input, output) {
  observeEvent(input$show, {
    showNotification("This is a notification.")
  })
}

shinyApp(ui, server)
r

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