JSFiddle - React, Tailwind, and code Playground

HTML

<table>
<tr>
  <td>aaaa</td>
  <td>bbbb</td>
</tr>
<tr>
  <td></td> 
  <td>ccccc</td>
</tr>
</table>

JavaScript

$('table td').each(function() {
    if($(this).text()) {
        $(this).append(' X');
    }
});