JSFiddle - React, Tailwind, and code Playground

HTML

<div>
</div>

CSS

html{
    position: relative;
    width: 100%;
    height: 100%;
}
*{
    padding:0;
    margin:0;
    border: 0;
}
button{ transition: border .25s;font-weight: bolder; }
button:focus {outline:0; }
button:active{border: 2px solid blue;}
div{
    display: inline-block;
    background-color:red;
    height: 100vh;
    width: 100vw;
}