JSFiddle - React, Tailwind, and code Playground

HTML

<canvas id="canvas"></canvas>
<div id="overlap"></div>

CSS

#overlap {
  background-color: green;
  height: 100px;
  width: 100px;
  margin-left: 50px;
  margin-top: -50px;
}

#canvas {
  background: red;
  width: 100px;
  height: 100px;
}