title: Edit CSS of renderDataTable in R shiny
body: <p>I am using R shiny to present data and  want to move filter of datatable from bottom to top. I have already got answer from stackoverflow suggests to change CSS. But I am not familiar with CSS, can anyone tell me how to modify CSS in <code>renderDataTable</code> function? Thanks!</p>
  
  <p>reference link: <a href="https://stackoverflow.com/questions/17629060/how-to-place-datatable-column-filter-on-top">How to place DataTables column filter on top</a></p>
  
  <p>I tried the following, but doesn't work:</p>
  
  <pre><code>  output$obs &lt;- renderDataTable({data()},
                                  options = list(aoColumnDefs = list(list(fnFilter$tfoot(display = "table-header-group"))))
                                  )
  </code></pre>