我对DataTables和Excel有问题。我使用pdf和打印功能，效果很好，但Excel效果不好。我在浏览器中（使用F12）收到此消息：
> Uncaught TypeError: f.parseXML is not a function
at a (buttons.html5.min.js:26)
at _Api.action (buttons.html5.min.js:26)
at v (dataTables.buttons.min.js:16)
at HTMLButtonElement.<anonymous> (dataTables.buttons.min.js:17)
at HTMLButtonElement.dispatch (jquery-3.3.1.slim.min.js:2)
at HTMLButtonElement.v.handle (jquery-3.3.1.slim.min.js:2)
我的JavaScript：
<script type="text/javascript">
$(document).ready(function () {
var table = $('#summary').DataTable({
dom: 'Bfrtip',
buttons: ['excel', 'csv', 'pdf', 'print']});
});
</script>
我的base.html.twig
<html>
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<link rel="stylesheet" href="https://bootswatch.com/4/flatly/bootstrap.min.css">
<link rel="stylesheet" type="text/css" href="https://cdn.datatables.net/1.10.19/css/jquery.dataTables.css">
<link rel="stylesheet" type="text/css" href="https://cdn.datatables.net/buttons/1.5.4/css/buttons.dataTables.min.css">
<link rel="stylesheet" type="text/css" href="https://cdn.datatables.net/responsive/2.2.3/css/responsive.dataTables.min.css">
<link rel="stylesheet" type="text/css" href="https://cdn.datatables.net/buttons/1.5.4/css/buttons.dataTables.min.css">
<link rel="stylesheet" type="text/css" href="https://cdn.datatables.net/select/1.2.7/css/select.dataTables.min.css"> …