DataTable Excel Export

HTML

<script src="https://code.jquery.com/jquery-3.2.1.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jszip/3.1.3/jszip.min.js"></script>
<script src="https://cdn.datatables.net/1.10.13/js/jquery.dataTables.min.js"></script>
<link rel="stylesheet" href="https://cdn.datatables.net/1.10.13/css/jquery.dataTables.min.css">
<script src="https://cdn.datatables.net/buttons/1.2.4/js/buttons.html5.min.js"></script>
<script src="https://cdn.datatables.net/buttons/1.2.4/js/dataTables.buttons.min.js"></script>
<link rel="stylesheet" href="https://cdn.datatables.net/buttons/1.2.4/css/buttons.dataTables.min.css">
<script src="https://cdn.rawgit.com/bpampuch/pdfmake/0.1.24/build/pdfmake.min.js"></script>
<script src="https://cdn.rawgit.com/bpampuch/pdfmake/0.1.24/build/vfs_fonts.js"></script>
<table id="example" class="display" cellspacing="0" width="100%">
  <thead>
    <tr>
      <th>First name</th>
      <th>Last name</th>
      <th>Position</th>
      <th>Office</th>
      <th>Salary</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Tiger</td>
      <td>Nixon</td>
      <td>System Architect</td>
      <td>Edinburgh</td>
      <td>
        <select>
          <option>Ekşi</option>
          <option selected="selected">Duyuru</option>
        </select>
      </td>
    </tr>
    <tr>
      <td>Tiger</td>
      <td>Nixon</td>
      <td>System Architect</td>
      <td>Edinburgh</td>
      <td>
        <select>
          <option selected="selected">Ekşi</option>
          <option>Duyuru</option>
        </select>
      </td>
    </tr>
  </tbody>
</table>

JavaScript

$(document).ready(function() {
  $('#example').DataTable({
    dom: 'Bfrtip',
    columns: [{
        data: 'name'
      },
      {
        data: 'surname'
      },
      {
        data: 'position'
      },
      {
        data: 'office'
      },
      {
        data: 'salary'
      }
    ],
    buttons: [{
      extend: 'pdfHtml5',
      exportOptions: {
        orthogonal: 'export',
        format: {
          body: function(data, row, column, node) {
            // Strip $ from salary column to make it numeric
            return column === 4 ?
               $(node).find(':selected').val() :
              data;
          }
        }
      }
    }]
  });
});