JSFiddle - React, Tailwind, and code Playground

by David Thomas

HTML

<div class="nope">
    Some text that should not be selected.
     <div>You need me!</div>
</div>
<span class="foo">Not me</span>
<span class="">Me too (probably)</span>

CSS

body * {
    display: block;
    width: 80%;
    margin: 0 auto;
    padding: 0.5em;
    border: 1px solid #000;
}

.found {
    color: #f00;
    border-color: #f00;
    border-radius: 0.5em;
    padding: 1em;
}

JavaScript

$('body *:not("[class]")').addClass('found');