JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container flow-root">
  <div class="float"></div>
</div>

CSS

.container {
  background-color: orange;
}

.float {
  float: left;
  width: 100px;
  height: 100px;
  background-color: purple;
}

.flow-root {
  display: flow-root;
}