JSFiddle - React, Tailwind, and code Playground

HTML

<div>
    <span>magix!</span>
</div>

CSS

div{
  background: red;
  bottom: 0;
  height: 100px;
  left: 0;
  margin: auto;
  position: absolute;
  top: 0;
  right: 0;
  width: 100px;
}
div {
    text-align:center;
    display:table;
}
span { 
    display: table-cell;
    vertical-align:middle;
}