在完成所有选择之前，我如何隐藏操作按钮？

I was wondering if there was a way to hide the action button on my shiny app until after the variable selections are displayed in the side panel. I have been having trouble achieving this with a uiOutput for the button as it confuses the dataTable, as it thinks that input$submit is an empty value. Here is the code so far:I was wondering if there was a way to hide the