JSFiddle - React, Tailwind, and code Playground

HTML

<div class="Tester"><div>...but nothing is being applied to the inner "sibling" div</div></div>
<div>...nor to the following div</div>

CSS

.Tester:before {
    content: 'Before element is here...';
}


.Tester:before + div {
    background-color: red;
}