JSFiddle - React, Tailwind, and code Playground

HTML

<p class="absolute-center"></p>

CSS

.absolute-center {
    position:absolute;
    height: auto;
    background: red;
    top: 0;
    bottom: 0;
    margin: auto;
    width: 100px;
    height: 100px;
    right: 0;
    left: 0;
}