title: Change row background color pdf export dataTable
body: <p>I need to check if the value of a column is negative and at the time of exporting to PDF, and if so, make that whole cell turn red or text-decoration: line-through. </p>
  
  <p>However I do not know how to access the elements to make such a modification.</p>
  
  <p>I can modify the background when it is being displayed in the browser but when exporting it does not work the same way. </p>
  
  <p>I use <a href="http://datatables.net/" rel="nofollow noreferrer">http://datatables.net/</a></p>
  
  <pre><code>    {
          extend: 'pdfHtml5',
          footer: true,
          text: 'PDF',
          header: true,
          title: t,
          orientation: 'landscape',
          exportOptions: {
              rows: function ( idx, data, node ) {
                  //node.attributes.style = {background-color: "#000";};
                  //console.log(node.attributes.style);
                  //return true;
                  // return data[2] === 'London' ?
                  // true : false;
              }
          },
          customize: function(doc) {
  
              doc.content.splice( 1, 0, {
                  margin: [ 0, 0, 0, 0 ],
                  alignment: 'center',
                  image: base64
              } );
              doc.defaultStyle.fontSize = 10;
              doc.pageMargins = [20,10,10,10];
              doc.styles.tableHeader.fontSize = 14;
              doc.styles.title.fontSize = 12;
              // Remove spaces around page title
              doc.content[0].text = doc.content[0].text.trim();
          } 
  
      },
      {
          extend: 'print',
          footer: true,
      }
  
      ],
  
      fnRowCallback: function( nRow, aData, iDisplayIndex, iDisplayIndexFull ) {
          var valor = aData[3].split('$');
          //console.log(teste);
          if (parseInt(valor[1])&lt;0) { 
              $(nRow).css('background-color', '#e96464')
          }else{
              $(nRow).css('background-color', '#cdedc1')
          }
      }
  
  });
  </code></pre>