JSFiddle - React, Tailwind, and code Playground

HTML

<button id="add">Add row</button>
<table>
    <tbody id="mytbody">
    </tbody>
</table>
Number of rows: <span id="counter"></span>

JavaScript

$(function() {
    $('#add').bind('click', function() {
        $('#mytbody').append('<tr><td>'+ new Date() +'</td></tr>');
        var count = document.getElementById("mytbody").getElementsByTagName("tr").length;
        $('#counter').html(count);
    });
});