osem-fcy/app/assets/javascripts/osem-datatables.js

$(function () {
  $.extend(true, $.fn.dataTable.defaults, {
    "stateSave": true,
    "autoWidth": false,
    "pagingType": "full_numbers",
    "lengthMenu": [[25, 50, 100, -1], [25, 50, 100, "All"]],
  });

  $('.datatable:not([data-source])').DataTable();

});