Custom parameters for jQuery Datatables with server-side processing

test.html.slim

label
  input#test-checkbox type="checkbox"
  |Test checkbox

table#test-table

javascript:
  $(document).ready(function() {
    var table = $("#test-table").dataTable( {
      "ajaxSource": '#{test_datatable_path}',
      "serverSide": true,
      
      "fnServerParams": function (aoData) {
        aoData.push({name: "testCheckbox", value: $("#test-checkbox").is(":checked") });
      },
      
      "aoColumns": [
        { "sTitle": 'Column 1', "name": 'column1'},
        { "sTitle": 'Column 2', "name": 'column2'},
        { "sTitle": 'Column 3', "name": 'column3', "orderable": false},
      ],
    });
    
    $('#test-checkbox').change( function() { table.fnDraw(); } );
  });