Answers for "datatable server side data function"

send data in datatable ajax

$('#datatable').DataTable({
        order: [],
        responsive: true,
        autoWidth: false,
        processing: true,
        serverSide: true,
        ajax: {
            url: AJAX_URL,
            data(d) {
                d.parameter_name_1 = 'value';
              	d.parameter_name_2 = 'value';
            }
        },
        columns: [
          {
          ---}
        ]
});

before send datatable options

var table = $('#example').DataTable();
 
table.on( 'draw', function () {
    alert( 'Table redrawn' );
} );

This could also be written as:

$('#example').on( 'draw.dt', function () {
    alert( 'Table redraw' );
} );