JSFiddle - React, Tailwind, and code Playground

HTML

<div id="parent">
    <div id="child">Text that is suppose to be centered</div>
</div>

CSS

#parent
{
    position:relative;
    height: 3em;
    border: 1px solid black;
}

#child
{
    position: absolute;
    top: 50%;
}