filter datatable with select dropdown

    jQuery(document).on('change', '#dropdown-1,#dropdown-2,#dropdown-3', function(e) {
      var url = 'url-lengkap-ke-server-side-datatable';
      var params = {
        'kolom-1': jQuery('#dropdown-1').val(),
        'kolom-2': jQuery('#dropdown-2').val(),
        'kolom-3': jQuery('#dropdown-3').val()
      };
      jQuery('#datatable-serverside').DataTable().ajax.url(url + "?" + jQuery.param(params)).load();
    });