Render function in DataTable

$(document).ready(function () {
            //Once the document is ready call Bind DataTable
            console.log("tickets!");
            ticketsTable();
        });

        function ticketsTable() {
           var table = $('#tickets-table').DataTable({
           "pageLength": 5,
           "lengthChange": false,
               data: tickets,
            columnDefs: [ {
                orderable: false,
                targets:   6
            } ],
                columns: [
                   { "data": "createdDate",
                     "render": function (data) {
                        var date = new Date(data);
                        var month = date.getMonth() + 1;
                        return  date.getDate() + "/" + (month.toString().length > 1 ? month : "0" + month) + "/" + date.getFullYear();
                    }
                     },
                   { "data": "id" },
                   { "data": "issueType" },
                   { "data": "userIssueStatus" },
                   { "data": "resolutionDate",
                    "render": function (data) {
                            if(data != null){
                            var date = new Date(data);
                            return date.toLocaleString("hi-IN");
//                            console.log(date.toLocaleString("en-US"));
//                            var month = date.getMonth() + 1;
//                            return  date.getDate() + "/" + (month.toString().length > 1 ? month : "0" + month) + "/" + date.getFullYear();
                            }else{
                            return "";
                            }
                        }
                    },
                   { "data": "userId" },
                   { "data": "resolutionDate",
                    'render': function(data, type, row, meta){
                            if(data == null){
                            if(type === 'display'){
                                    data = '<a href="/paytail-app/faq/updateFaqsFromDetailsPage/' + row.id +'/'+ row.userId +'" ">' + 'click' + '</a>'
                                }
                                return data;
                            }else{
                            return "Closed";
                            }
                        }
                    }
                ]
             });

        }