R Shiny : Styling the download button - Change the back-ground color, font, font color and style of download button

server.r

library(shiny)
shinyServer(function(input, output) {
  
  })

ui.r

library(shiny)

shinyUI(fluidPage(
  titlePanel("Styling Download Button"),
  sidebarLayout(
    sidebarPanel(
      h4("Default CSS styling"),
      # default styling
      downloadButton('downloadData1', label= 'Download 1'), 
      tags$hr(),
      
      h4("Styling using tags()"),
      downloadButton("download", label="Download with default CSS"),
      
      # Using the class parameter in download button and tags() to define the style     
      downloadButton("download0", label="Download with style", class = "butt"),
      tags$head(tags$style(".butt{background-color:#add8e6;} .butt{color: white;}")), # background color and font color
     
      downloadButton("download1", label="Download with style", class = "butt1"),
      # style font family as well in addition to background and font color
      tags$head(tags$style(".butt1{background-color:orange;} .butt1{color: black;} .butt1{font-family: Courier New}")),  
      
      
      downloadButton("download2", label="Download with style", class = "butt2"),
      # making the font italics this time
      tags$head(tags$style(".butt2{background-color:black;} .butt2{color: white;} .butt2{font-style: italic;}"))
      
    ),
    mainPanel()
  )
))

Hi there but where a put this code? i need open a git command?

Hello,
Assuming you have loaded the shiny package, after that on console write the following to run this GIST.
runGist("https://gist.github.com/aagarw30/9c60b87e839db05b8dcc")

when using dashboard, I had to use !important:

downloadButton("report", "Generate report", class="butt"),
      tags$head(tags$style(".butt{color: black !important;}")), #  font color