JSFiddle - React, Tailwind, and code Playground

HTML

<input type="submit" id="submitID" value="ID" />
<input type="submit" id="submitClass" value="Class" />

<ul id="myList" class="myClass">
   <li>first list item</li>
   <li>second list item</li>
   <li>third list item</li>
</ul>

JavaScript

$('#submitID').click(function(){
    $('#myList').append('<li>fourth list item</li>');
});

$('#submitClass').click(function(){
    $('.myClass').append('<li>fourth list item</li>');
});