export data from several tables to an excel document on several sheets

[Ricardo-GM]

I would like to be able to export data from several tables to an excel document on several sheets, that is, a table on each excel sheet.
I am working with codeigniter 3.
My code is as follows:
window.saveFile = function saveFile () {

         var opts = [{
             sheetid: 'Sheet 1',
             headers: false
         }, {
             sheetid: 'Sheet 2',
             headers: false
         }];

         var res = alasql ('SELECT INTO XLSX ("TestExcel.xlsx",?) FROM HTML, [opts, ["# Table1", "Table2"]];
     }