JSFiddle - React, Tailwind, and code Playground

HTML

<div class="floatovany"></div>
<div class="normalny"></div>

CSS

.floatovany {
  float: left;
  width: 40px;
  height: 40px;
  background-color: red;
}
.normalny {
  width: 40px;
  height: 40px;
  background-color: blue;
}