Change row background color pdf export dataTable

[VitorBenjamin]

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.

However I do not know how to access the elements to make such a modification.

I can modify the background when it is being displayed in the browser but when exporting it does not work the same way.

{
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])<0) { 
        $(nRow).css('background-color', '#e96464')
    }else{
        $(nRow).css('background-color', '#cdedc1')
    }
}