JSFiddle - React, Tailwind, and code Playground

HTML

<table id="data" width="200" border="1">
  <tr>
    <th scope="col">Daten 1</th>
    <th scope="col">Daten 2</th>
    <th scope="col">Daten 3</th>
  </tr>
  <tr>
    <td>1</td>
    <td>1</td>
    <td>&nbsp;</td>
  </tr>
  <tr>
    <td>2</td>
    <td>2</td>
    <td>&nbsp;</td>
  </tr>
  <tr>
    <td>3</td>
    <td>3</td>
    <td>&nbsp;</td>
  </tr>
  <tr>
    <td>4</td>
    <td>4</td>
    <td>&nbsp;</td>
  </tr>
</table>

JavaScript

$('table tr:nth-child(3) td:nth-child(3)').html('changed');