how integrate if i don't know length of my data

zeing

i get data from ajax post request to api
how integrate if i don't know length of my data ????

i want to lazy loading when my transaction data is very big and my api support lazy loading .
this is my js to post to api then api will get respond data to me

table_redeem = $('#table_redeem').DataTable({
                deferRender:    true,
                scrollY:        200,
                scrollCollapse: true,
                scroller:       true,
                "ajax": function (data, callback, settings) {
                    var data = {
                       "cmd": "getTransaction",
                        "firstitemindex": 1,               //if set  firstitemindex 1 and itemperpage 10 , will get data[0]-data[9] 
                        "itemperpage": 100,           /if set  firstitemindex 11 and itemperpage 15 , will get data[10]-data[24] 
                        "order": "asc",
                    }
                    data = JSON.stringify(data)
                    $.ajax({
                        url: config.api,
                        crossDomain: false,
                        contentType: "application/json",
                        dataType: 'json',
                        type: 'POST',
                        data: data,
                        success: function (data) {
                            if (!data.error) {//Command SUCCESS
                                    arrTransRedeem = data
                      
                            } else {
                                console.log('Handel error later !');
                            }
                        },
                        error: function (xhr, status, err) { // server doesn't respone
                            console.error('Contact backend error');
                            console.log(xhr, status, err);
                        },
                        complete: function () {
                            callback({data: arrTransRedeem});
                        }
                    });

                },
                "columns": [
                    {"data": "trx"}, // <-- which values to use inside object
                    {"data": "description"},
                    {"data": "subscribername"},
                    {"data": "productitemname"},
                    {"data": "qty"},
                    {"data": "amount"},
                    {
                        "data": "operator", "render": function (data, type, full, meta) {
                        return "YAYA"
                    }
                    },
                    {
                        "data": "branch", "render": function (data, type, full, meta) {
                        return "";
                    }
                    },
                    {
                         "data": "requestdate","width":"10%", "render": function (data, type, full, meta) {
                        return formatDate2(data)
                    }
                    },
                    {
                        "data": "status", "render": function (data, type, full, meta) {
                        if (data == 0)
                            return "<span class='label label-success'>Success</span>"
                        else if (data == 2)
                            return "<span class='label label-default'>Cancel</span>"
                        else
                            return "<span class='label label-danger'>Failed</span>"
                    }

                    },
                    {
                        "orderable": false, "data": "id", "width": "5%", "render": function (data, type, full, meta) {
                        return "<button type='button' class='btn btn-action' data-trx=" + full.trx + "  data-toggle='modal' data-target='#modalTransaction' id='trans_detail'> <i class='fa fa-search'></i> </button>"
                    }
                    }
                ]
            });

allan

I'm afraid there is no option to not specify the size of the data. You could consider using server-side processing if you know the number of rows, and that allows lazy loading.

But there is no way to not specify the total number of rows - consider for example how would Scroller know how many rows to allow scrolling to if the number of rows was undefined.

Allan

zeing

can i scroll down incessant when i still don't know about my length of data ?

can give me example about it ?

eing
thank you

zeing

okay i can get total of transaction by
db.collection.count() .
Can i use server-side processing ?