DataTables Excel Check each cell

Loop over each cell when exporting to excel

HTML

<script src="https://code.jquery.com/jquery-1.12.4.min.js"></script>
<script src="https://cdn.datatables.net/1.10.12/js/jquery.dataTables.min.js"></script>
<script src="https://cdn.datatables.net/buttons/1.2.1/js/dataTables.buttons.min.js"></script>
<link rel="stylesheet" href="https://cdn.datatables.net/1.10.12/css/jquery.dataTables.min.css">
<link rel="stylesheet" href="https://cdn.datatables.net/buttons/1.2.1/css/buttons.dataTables.min.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/jszip/3.0.0/jszip.min.js"></script>
<script src="https://cdn.datatables.net/buttons/1.2.1/js/buttons.html5.min.js"></script>
    <div class="container">
      <table id="example" class="display nowrap" width="100%">
        <thead>
          <tr>
            <th>Name</th>
            <th>Position</th>
            <th>Office</th>
            <th>Age</th>
            <th>Start date</th>
            <th>Salary</th>
          </tr>
        </thead>

        <tfoot>
          <tr>
            <th>Name</th>
            <th>Position</th>
            <th>Office</th>
            <th>Age</th>
            <th>Start date</th>
            <th>Salary</th>
          </tr>
        </tfoot>

        <tbody>
          <tr>
            <td>Tiger Nixon</td>
            <td>36</td>
            <td>Edinburgh</td>
            <td>61</td>
            <td>2011/04/25</td>
            <td>$3,120</td>
          </tr>
          <tr>
            <td>Garrett Winters</td>
            <td>Director</td>
            <td>Edinburgh</td>
            <td>63</td>
            <td>2011/07/25</td>
            <td>$5,300</td>
          </tr>
          <tr>
            <td>Ashton Cox</td>
            <td>Technical Author</td>
            <td>San Francisco</td>
            <td>66</td>
            <td>2009/01/12</td>
            <td>$4,800</td>
          </tr>
          <tr>
            <td>Cedric Kelly</td>
            <td>Javascript Developer</td>
            <td>Edinburgh</td>
            <td>22</td>
           ...

CSS

body {
  font: 90%/1.45em "Helvetica Neue", HelveticaNeue, Verdana, Arial, Helvetica, sans-serif;
  margin: 0;
  padding: 0;
  color: #333;
  background-color: #fff;
}

JavaScript

$(document).ready( function () {
  $('#example').DataTable( {
  	dom: 'Blfrtip',
    buttons: [
        {
            extend: 'excelHtml5',
            text: 'Save as Excel',
            customize: function( xlsx ) {
                var sheet = xlsx.xl.worksheets['sheet1.xml'];
                $('row* c[r]', sheet).each( function () {
 									if ( $('is t', this).text().match(/(?:^|\b)(Engineer)(?=\b|$)/gmi) || $('is t', this).text() == "36") {
										$(this).attr( 's', '20' );
									}
                });
        		}
        }
    ]
  } );
} );