Front-end export excel spreadsheet

exportExcelFile function () { 
    the let TableData = $ ( "# itemBankTable") [0]; // Get the target table DOM object 
    let sheet = XLSX.utils.table_to_sheet (tableData); // convert a table object into a sheet objects 
    openDownloadDialog (sheet2blob (sheet), 'exam schedule information .xlsx'); // enable download 
}