JSFiddle - React, Tailwind, and code Playground

HTML

<body height="100px">
    <div class="cover">
        &nbsp;
    </div>
</body>

CSS

body{
    height: 100px;
    width: 100px; 
    border-style: solid;
}
.cover{
    display: block;
    width: 50px;
    height: auto;
    margin-top: 20px;
    margin-bottom: 20px;
    margin-left: auto;
    margin-right: auto;
    background-color: red;
}

JavaScript

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