JSFiddle - React, Tailwind, and code Playground

HTML

<div><img src="http://placehold.it/250x250/" width="250" height="250"></div>

CSS

div {
  position: relative;
}

div:before {
  background-color: black;
  opacity: 0.5;
  color: white;
  display:block;
  width: 15%;
  height: 100%;
  content: "stuff";
  position:absolute;

  top: 0; left: 0;
  text-align: center;
}