JSFiddle - React, Tailwind, and code Playground

by brigand

HTML

<div class="box"></div>
<div class="float"></div>

CSS

body {
  width: 16em;
  margin: auto;
}
.box {
  width: 12em;
  height: 1em;
  background: black;
}

.float {
  width: 1em;
  height: 1em;
  float: right;
  background: hotpink;
}