JSFiddle - React, Tailwind, and code Playground

HTML

<table id="table">
    <tr id="firstRow"><td>One</td><td>Two</td></tr>
</table>

JavaScript

var html = "<tr><td>Three</td><td>Four</td></tr>";
var table = document.getElementById("table");
var range = document.createRange();
range.selectNodeContents(table);
var frag = range.createContextualFragment(html);
table.appendChild(frag);