JSFiddle - React, Tailwind, and code Playground

by GolezTrol

HTML

<a class="up">Koe</a>

CSS

.up:before {
    display: block;
    float: right;
    content: "";
    background-color: red;
    width: 100px;
    height: 100px;
}

.up:hover:before {
    opacity: 0.5;
}