JSFiddle - React, Tailwind, and code Playground
HTML
<table id='table2'>
<tr><td>test</td></tr>
</table>
<input type='button' id='addRow' value='click' onclick='addRow()' />
JavaScript
$('#addRow').click(function(){
var row = $('#table2 tr:eq(0)').clone();
$(row).find('td').html('add');
$('#table2').append(row);
});