JSFiddle - React, Tailwind, and code Playground

HTML

<a href='#'>Test</a>

CSS

body {
    color:#ffffff;
    font-family:"Helvetica";
    font-size:12pt;
    background-color:#000000;
    font-weight:bold;
}
a:link {
    color:white;
    text-decoration:none;
    -webkit-transition: background-color 1s, color 1s;
    /*-webkit-transition: all 1s;*/
    -webkit-transition-timing-function: ease-in-out;    
}
a:hover {
    font-weight: bold;
    background-color: white;
    color: black;
}