Link to test case:
Debugger code (debug.datatables.net):
there is my code

$(document).ready(function () {
                    // Setup - add a text input to each footer cell
                    $('#tabel_data tfoot th').each(function () {
                        // $('#tabel_data tfoot tr').appendTo('#tabel_data thead');
                        var title = $(this).text();
                        $(this).html('<input type="text" placeholder="Cari ' + title + '" />');
                        
                    });
                
                    // DataTable
                    var table = $('#tabel_data').DataTable({
                        language:{searchPlaceholder: "Cari Data Tagihan Pendapatan"},
                        dom: 'Blfrtip',
                        buttons: [
                         
                                    {
                                        extend: 'excel',
                                        text: 'Export',
                                        customize: function( xlsx ) {
                                                var sheet = xlsx.xl.worksheets['sheet1.xml'];
                                            // Get reference to the worksheet and parse it to xml nodes
                                                // Has to be done this way to avoid creation of namespace atributes.
                                                var afSerializer = new XMLSerializer();
                                                var xmlString = afSerializer.serializeToString(sheet);
                                                var parser = new DOMParser();
                                                var xmlDoc = parser.parseFromString(xmlString,'text/xml');
                                                //Create header and add it to the worksheet
                                                var headerFooter = xmlDoc.createElementNS('http://schemas.openxmlformats.org/spreadsheetml/2006/main','headerFooter');
                                                sheet.getElementsByTagName('worksheet')[0].appendChild(headerFooter);
                                                var nodeHeaderFooter = sheet.getElementsByTagName("headerFooter");
                                                //Creation of the header
                                                var oddHeader = xmlDoc.createElementNS('http://schemas.openxmlformats.org/spreadsheetml/2006/main','oddHeader');
                                                nodeHeaderFooter[0].appendChild(oddHeader);
                                                var nodeOddHeader = sheet.getElementsByTagName("oddHeader");
                                                var txtHeader = "&L"+"&F - &A"+"&R"+"&D - &T";
                                                var nodeHeader = xmlDoc.createTextNode(txtHeader);
                                                nodeOddHeader[0].appendChild(nodeHeader);
                                                //Creation of the footer
                                                var oddFooter = xmlDoc.createElementNS('http://schemas.openxmlformats.org/spreadsheetml/2006/main','oddFooter');
                                                nodeHeaderFooter[0].appendChild(oddFooter);
                                                var nodeOddFooter = sheet.getElementsByTagName("oddFooter");
                                                var txtFooter = "&R"+"Page &P of &N";
                                                var nodeFooter = xmlDoc.createTextNode(txtFooter);
                                                nodeOddFooter[0].appendChild(nodeFooter);
                                                //Add header and footer to the worksheet
                                                sheet.getElementsByTagName('worksheet')[0].appendChild(headerFooter);
                                            },
                                    } 
                                ],
                                
                                    
                               
                        initComplete: function () {
                            // Apply the search
                            this.api()
                                .columns()
                                .every(function () {
                                    
                                    var that = this;

                                    $('input', this.footer()).on('keyup change clear', function () {
                                        if (that.search() !== this.value) {     
                                            that.search(this.value).draw();
                                        }  
                                    });
                                });
                            },
                        });
                        $('#tabel_data tfoot tr').appendTo('#tabel_data thead').hide();

Error messages shown:
Description of problem:
I can already export using the default datatable plugin to export to excel but when exporting it looks like there is a depreciation of numbers, for example there is 1000 or 1,000 exported data when in excel it changes to just 1 without any commas or dots, what do you think is the solution?
Is there something wrong with my code, please enlighten me

that should be

Edited by Colin - Syntax highlighting. Details on how to highlight code using markdown can be found in this guide.