JSFiddle - React, Tailwind, and code Playground

HTML

<p>This is a paragraph.</p>
<p>This is another paragraph.</p>

<ol>
  <li>List item 1</li>
  <li>List item 2</li>
  <li>List item 3</li>
</ol>

<button id="btn1">Append text</button>
<button id="btn2">Append list item</button>

JavaScript

$("#btn1").click(function(){
  $("p").append(" <b>Appended text</b>.");
});
$("#btn2").click(function(){
  $("ol").append("<li>Appended item</li>");
});