Get ID Pokmas

var pokmas_id;
var table;

function reload_table() {
    table.ajax.reload(null,false); //reload datatable ajax
}

function getIDPokmas() {
    $.ajax({
        url : "<?php echo site_url('operator/pokmas/get_id_pokmas/'.$this->uri->segment(4).'/'.$this->uri->segment(5).'/'.$this->uri->segment(6))?>",
        type: "GET",
        dataType: "JSON",
        success: function(data) {
            if (data === null) {
                pokmas_id = '';
            } else {
                pokmas_id = data.pokmas_id;
            }

            return pokmas_id;
        },
        error: function (jqXHR, textStatus, errorThrown) {
            alert('Error get data from ajax');
        }
    });
}

$(document).ready(function() {
    var id_pokmas = getIDPokmas();
    console.log(id_pokmas);
    table = $('#tableData').DataTable({
        "paging": false, // HIlangkan Pagination
        "searching": false, // Hilangkan Search
        "responsive": true,
        "processing": false,
        "serverSide": true,
        "order": [ 1, 'asc'],
        "ajax": {
            "url": "<?php echo site_url('operator/pokmas/data_list_pokmas')?>"+"/"+id_pokmas,
            "type": "POST"
        },
        "columnDefs": [
        {
            "targets": [ 0 ],
            "orderable": false,
        },
        ],
    });
});