Hi,
I've a datable with many entries.
I want to show a spinner when the data are loading.
Without ajax code, the spinner work well.

$(document).ready(function() {
var columns = []; 
$.ajax({
        url: "/fwru/get",
        dataType: "json",
        success: function (data) {
            var columns = [];
            var maxLength = data.reduce(function(max, row) {
                    return Math.max(max, row.length);
                }, 0);
            //build the DataTable dynamically.
            for (var i = 0; i < maxLength; i++) {
                columns.push({
                    data: i,
                    title: "Cond" + i
                });
            }
            $('#listeFWRU').DataTable({
                data: data,
                processing: true,
                language: {
                        'loadingRecords': '&nbsp;',
                        'processing': '<div class="spinner"></div>'
                    },
                columnDefs: [{
                    "defaultContent": "-",
                    "targets": "_all"
                    }],
                scrollX: true,
                scrollCollapse: true,
                    scrollY: '45vh',
                    scrollX: true,
                    layout: {
                            top1: 'searchBuilder',
                            top1Start: {

                                buttons: [
                                'copy',
                                    'print',
                                    {
                                        extend: 'spacer',
                                        style: 'bar',
                                        text: '| Export files:'
                                    },
                                    'csv',
                                    'excel',
                                    'spacer',
                                    'pdf'
                                ]},
                        },
                columns: columns
            });
            }
        })
});          

Here, with the ajax code, and maybe the 'success' option, the datable show only when all entries are loading. So without spinner.
I don't know how can I resolve this ?
Thanks for your advice.