JSFiddle - React, Tailwind, and code Playground

HTML

<div class="div1">
    <div class="div2">vertical</div>

CSS

* {
    margin: 0;
    padding: 0;
}
.div1 {
    height:100px;
    background-color: red;
    position:relative;
}
.div2 {
    border: 1px solid;
    background-color: orchid;
    text-decoration: none;
    letter-spacing: 1px;
    text-transform:uppercase;
    padding: 5px;
    position: absolute;
    right:5%;
    top:0%
}

JavaScript

jQuery(document).ready(function () {
    var l = jQuery('.div1').outerHeight();
    var level = l / 2;
    var bt = jQuery('.div2').outerHeight() / 2;
    var val = level - bt;
    jQuery('.div2').css("margin-top", val);
});