JSFiddle - React, Tailwind, and code Playground

HTML

<table id="foo">
    <tbody>
        <tr>
            <td>Foo</td>
        </tr>
    </tbody>
</table>

JavaScript

var tbody = document.getElementById("foo").getElementsByTagName("tbody")[0];
alert(tbody);
tbody.innerHTML += "<tr><td>Bar</td></tr>";