JSFiddle - React, Tailwind, and code Playground

HTML

<a href="#">Hej jeg har css hover effekt</a>

CSS

a {
    -moz-transition: all 0.5s ease-in-out;
    -webkit-transition: all 0.5s ease-in-out;
    -o-transition: all 0.5s ease-in-out;
    transition: all 0.5s ease-in-out;
    -ms-transition: all 0.5s ease-in-out;
    color:#f03;
    background:#666;
    padding:10px;
}
a:hover {
    color:#f0c;
    background:#222;
}