j_tablesort template which includes the default sort option provided by Contao

j_tablesort.html5

<?php

// Add the tablesorter style sheet
$GLOBALS['TL_CSS'][] = 'assets/jquery/tablesorter/' . $GLOBALS['TL_ASSETS']['TABLESORTER'] . '/css/tablesorter.css|static';

?>

<script src="<?= TL_ASSETS_URL ?>assets/jquery/tablesorter/<?= $GLOBALS['TL_ASSETS']['TABLESORTER'] ?>/js/tablesorter.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/js-cookie/2.0.4/js.cookie.min.js"></script>
<script>
  (function($) {
    $(document).ready(function() {
      $('.ce_table .sortable').each(function(i, table) {
        var params = {};
        var sc = Cookies.get('TS_'+$(this).attr('id').toUpperCase());
        if (sc) {
          sc = sc.split('|');
          params = {sortList: [[sc[0],sc[1]=='asc'?'0':'1']]};
        }
        $(table).tablesorter(params);
      });
    });
  })(jQuery);
</script>