JSFiddle - React, Tailwind, and code Playground

HTML

<div class="section" id="section1">    
    <h1>Lorem ipsum</h1>
</div>

CSS

html, body {
    height:100%;
    margin:0;
    padding:0;
}
h1{
    margin:0;
    padding:0;
    vertical-align:middle;
    display:table-cell;
}
#section1 {
    width:100%;
    min-height:90%;
    text-align:center;
    display:table;
}