Simply add this script to your web page:
<script src="https://cdn.dotmaui.com/p24/js/exportTableToExcel.min.js"></script>
To use it, call the exportTableToExcel() function specifying the table id as the first argument and optionally the file name as the second argument.
Example:
exportTableToExcel('mytable', 'my-excel-file'); exportTableToExcel('mytable');
To see the source of the exportTableToExcel() function view this paste.