JSFiddle - React, Tailwind, and code Playground

HTML

<div class="input">
    <div>CENTER & MIDDLE THIS</div>
</div>

CSS

html,body{height:100%}
.input {
    height:100%;
    width: 100%;
    border: 1px solid black; display:table
}
.input3 div {
    display:table-cell; 
    vertical-align:middle;
    margin:auto 0
}