JSFiddle - React, Tailwind, and code Playground

by isqua

HTML

<div>
</div>

CSS

div
{
    position: relative;

    width: 300px;
    height: 500px;
    padding: 20px;

    border: solid #2px green;
    background: red;
}

div::before
{
    position: absolute;

    min-width: 100%;
    min-height: 100%;

    content: '';

    background: rgba(0,0,0,.5);
}