JSFiddle - React, Tailwind, and code Playground

HTML

<p>Hello World</p>
<div id="dimScreen"></div>

CSS

html, body {
    height: 100%;
    margin: 0px;
}

#dimScreen
{
    width: 100%;
    height: 100%;
    background:rgba(255,255,205,0.5);
    position: fixed;
    top: 0px;
    left: 0px;
    z-index: 1000;
}