JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
</li>test</li>
</ul>

CSS

ul {
    background-color:black;
    color:white;
    width: 100px;
    height:100px;
    -webkit-transition: all 0.2s ease-in-out;

}     
        ul:hover {
            
         }