JSFiddle - React, Tailwind, and code Playground

HTML

<div id="mydiv"></div>

CSS

#mydiv { 
    -moz-box-shadow: inset 2px 0 4px #000;
    -webkit-box-shadow: inset 2px 0 4px #000;
    box-shadow: inset 2px 0 4px #000;
}
#mydiv {
    width: 200px;
    height: 200px;
}