JSFiddle - React, Tailwind, and code Playground
by Ben Watts
HTML
<p id="rowscount"></p>
<table>
<tr>
<td>One</td>
<td>Two</td>
</tr>
<tr>
<td>One</td>
<td>Two</td>
</tr>
</table>
JavaScript
document.getElementById('rowscount').innerHTML = document.getElementsByTagName("tr").length;