JSFiddle - React, Tailwind, and code Playground

HTML

<div>
    <span>1<br>1</span>
    <span>2</span>
</div>

CSS

div{height:100px;border:1px solid #000;}
div span{display:inline-block;vertical-align:middle;}
div:after{content:'';display:inline-block;width:0;height:100%;vertical-align:middle;}