JSFiddle - React, Tailwind, and code Playground

HTML

<div id="vhtest"></div>

CSS

body {
    margin: 0;
    padding: 0;
}

#vhtest {
    position: relative;
    top: 5vh;
    height: 90vh;
    width: 50vh;
    margin: 0 auto;
    border: 1px solid red;
}