JSFiddle - React, Tailwind, and code Playground

by shooter

HTML

<div class="parent">
  <div class="child"></div>
</div>

CSS

.parent {
    height: 100px;
    width: 100px;
    background-color: lime;
    position: absolute;
}

.child {
    position: absolute;
    margin-top: 20px;
    height: 100px;
    width: 100px;
    background-color: blue;
    z-index: -100;
}