JSFiddle - React, Tailwind, and code Playground

HTML

<div  class="one-edge-shadow"></div>

CSS

.one-edge-shadow {
    width:200px;
    height:200px;
     border-style: solid; 
    border-width: 1px;    
	-webkit-box-shadow: 0 8px 6px -6px black;
	-moz-box-shadow: 0 8px 6px -6px black;
	box-shadow: 0 8px 6px -6px black;
}