title: excelHtml5 button not showing up
body: <p>I'm using the latest DataTables-bs4 and buttons-bs4 version (1.10.19 and 1.5.4 respectively) in a Laravel-Vue project and the export to excel button is not showing up, CSV and PDF are working as intended</p>
  
  <p>This is how I'm importing all the necessary dependencies in the bootstrap.js file:</p>
  
  <pre><code>import jszip from 'jszip';
  import datatable_responsive_bs4 from 'datatables.net-responsive-bs4';
  import datatable_buttons_bs4 from 'datatables.net-buttons-bs4';
  import datatable_buttons_html5 from 'datatables.net-buttons/js/buttons.html5';
  /*
  * other code over here
  *
  *
  */
  window.jszip = jszip;
  window.datatable_responsive_bs4 = datatable_responsive_bs4;
  window.datatable_buttons_bs4 = datatable_buttons_bs4;
  window.datatable_buttons_html5 = datatable_buttons_html5;
  window.pdfmake = require('pdfmake/build/pdfmake.js');
  window.vfs_fonts = require('pdfmake/build/vfs_fonts.js');
  window.pdfmake.vfs = window.vfs_fonts.pdfMake.vfs;
  </code></pre>
  
  <p>And this is how I'm initializing the DataTable:</p>
  
  <pre><code>$('#table').DataTable({
      dom: 'Bfrtip',
      responsive: true,
      buttons: [
          'excelHtml5',
          'csvHtml5',
          {
              extend: 'pdfHtml5',
              orientation: 'landscape',
              pageSize: 'LEGAL'
          }
      ],
      order: [[1, 'desc']]
  });
  </code></pre>
  
  <p>This is the most I can get, excel is not showing up at all:</p>
  
  <p><a href="https://i.stack.imgur.com/9I89L.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/9I89L.png" alt="enter image description here"></a></p>
  
  <p>What am I doing wrong and what can I change to fix it?</p>
  
  <p>Thanks in advance.</p>