Shinyalert响应问题

Question

在我的代码中，我设置了一个删除项目的闪亮警报，但要使其正常工作，用户需要单击两次按钮，因为第一个响应始终为FALSE。我假设它是因为FALSE是初始值，并且该函数输出值，然后将其更改为新的响应。有办法解决吗？

虚拟代码：

library(shiny)
library(shinyalert)

shinyApp(
  ui = fluidPage(
    useShinyalert(),  # Set up shinyalert
    actionButton("btn", "Delete")
  ),
  server = function(input, output) {
    global <- reactiveValues(response = FALSE)

    observeEvent(input$btn, {
      shinyalert(
        title = "Are you sure you want to delete this file?",
        callbackR = function(x) {
          global$response <- x
        },
        text = "You will not be able to recover this imaginary file!",
        type = "warning",
        showCancelButton = TRUE,
        confirmButtonCol = '#DD6B55',
        confirmButtonText = 'Yes, delete it!'
      )
      print(global$response)
    })
  }
)