JSFiddle - React, Tailwind, and code Playground

HTML

<div class="middle-align">
        <p>This is a vertically centered paragraph</p>
    </div>
</div>

CSS

.middle-align {
    height:400px;
    background-color:gray;
    display: -ms-flexbox;
	display: -webkit-flex;
	display: flex;
	-ms-flex-align: center;
	-webkit-align-items: center;
	-webkit-box-align: center;
	align-items: center;
}