title: How to eliminate the bottom border line while using autoWidth
body: <p>I am looking for a way to eliminate the bottom border line in my DataTable. I've found one solution (link below) but it does not work with <em>autoWidth</em> argument that I would like to keep. Any idea would be much appreciated.</p>
  <pre><code> hi &lt;- iris %&gt;% group_by(Species) %&gt;%
      dplyr::summarise(
          Sepal.Length.Average = mean(Sepal.Length), 
          Sepal.Width.Average = mean(Sepal.Width)
      )
  
  callback &lt;- 
      &quot;$('table.dataTable.no-footer').css('border-bottom', 'none');&quot;
  
  
  datatable(
      hi, 
      rownames = FALSE, 
      width = 600,
      filter = &quot;none&quot;, 
      callback = JS(callback),
      options = 
          list(
              dom = 't',
              autoWidth = TRUE,
              scrollX = TRUE,
              columnDefs = list(
                  list(targets = 0, className = &quot;dt-right&quot;)
              )
          )
  )
  </code></pre>
  <p><a href="https://stackoverflow.com/questions/59739325/reducing-width-of-datatable-eliminating-the-bottom-border-line-and-centering-a">Solution I am basing on</a></p>