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?? ??? ?? ??? MWE ??? ???? Shiny ??? ???? actionButton() ? ??? ??? ????? ???. ? ??? ???? ??? ??????

?? ?? ?? ?? ?? ???? ?????. ?? HTML?? CSS? ?? ? ?? ???? HTML/CSS ??? ?? ????? ?? ??? ????? ?? ????? ??? ???? ???? ??? ??? ?? ???? ????. ??? ??.

MWE ??:

library(shiny)

ui <- fluidPage(
  br(),
  actionButton(
    "add",
    HTML("Add <br/> column"), 
    width = '80px',
    style='padding:0px; font-size:100%')
  )

server <- function(input,output,session)({})

shinyApp(ui, server)