JSFiddle - React, Tailwind, and code Playground

HTML

<body>
	<div class="Center-Container">
		<div class="Absolute-Center">
		Если на
		</div>
	</div>
</div>
</body>
</html>

CSS

html, body, .Center-Container {
    height: 100%;
    margin: 0;
}

.Center-Container {
position: relative;
}

.Absolute-Center {
width: 20%;
height:20%;
display: table;
margin:auto;
position:absolute;
top:0; left:0; right:0; bottom:0;
    overflow: auto;
}