JSFiddle - React, Tailwind, and code Playground

by Itay

HTML

<div class="">
    <div class="">
        <div class="">
            <div class="fullscreen"></div>
        </div>
    </div>
</div>

CSS

div {
    border: 2px solid red;
    margin: 20px;
    padding: 5px;
}
.fullscreen {
    margin: 0;
    padding: 0;
    border: 0;
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background:yellow;
    opacity: 0.5;
}