JSFiddle - React, Tailwind, and code Playground

HTML

<div class="demo">
    
    <button>A button element</button>
    
    <input type="submit" value="A submit button"/>
    
    <a href="#">An anchor</a>
    
</div><!-- End demo -->

JavaScript

$(function() {
    $('.demo').append("<br>Expected 3, actual: " + $("button, input:submit, a", ".demo").length);
    $('.demo').append("<br>Expected 2, actual: " + $("input:submit, a", ".demo").length);
    $('.demo').append("<br>Expected 3, actual: " + $(":button, input:submit, a", ".demo").length);
});