DataTable with several type of checkbox

Am using datatable with checkbox. have serveral checkbox with two type of class name.Need to check all checkbox based on class name

This is my code :-

      var exampless = $('.table1').DataTable({
        responsive: true,
        "searching": false,
        "ordering": false,
        "lengthChange": false,
         "bInfo" : false,
         className: 'select-checkbox',
     });
     $(".alluser").click(function () {
        var cols = exampless.column(0).nodes(),
        state = this.checked;

        for (var i = 0; i < cols.length; i += 1) {
        cols[i].querySelector(".User").checked = state;
        }
     });

Getting this error

TypeError: cols[i].querySelector(...) is null