KTDatatable Problem with href javascript

demo

columns: [
    {
        field: 'Actions',
        width: 110,
        title: 'Ενέργειες',
        sortable: false,
        overflow: 'visible',
        template: function(row) {

          return '\
            <a href="javascript:alert('+row.id+');" onclick="javascript:alert('+row.id+');" data-user-id="'+ row.id +'" class="showQR btn btn-sm btn-clean btn-icon btn-icon-sm" title="QR Code">\
              <i class="la la-qrcode"></i>\
            </a>\
          ';
        },
    }
]

Hi Did u find solution to it??