JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://code.jquery.com/jquery-latest.min.js"></script>
<table id="myTable" style="cursor :pointer;">
 <tr>
   <td>col 1</td><td>col2</td>
 </tr>
 <tr>
   <td>field</td><td>Field 2</td>
 </tr>
 <tr>
   <td>another field</td><td>one more field</td>
 </tr>
</table>

JavaScript

$("#myTable tr").click(function(){
   $(this).addClass('selected').siblings().removeClass('selected');
   var value=$(this).find('td:eq(1)').html();
   if (value) {
   alert('adding New Row !')
   $('#myTable').find('tbody:last').append('<tr><td>new Field</td><td>New Field</td></tr>');
	}
});