JSFiddle - React, Tailwind, and code Playground

HTML

<div class="vertical">Vertical Text</div>

CSS

body {
    padding: 0;
    margin: 0;
}
.vertical {
    position: relative;
    background-color: #DDDDDD;
    padding: 10px;
    border-radius: 5px 5px 0 0;
    float: right;
    -moz-transform: rotate(270deg);  /* FF3.5+ */
    -o-transform: rotate(270deg);  /* Opera 10.5 */
    -webkit-transform: rotate(-90deg);  /* Saf3.1+, Chrome */
}