JSFiddle - React, Tailwind, and code Playground

HTML

<div class="coucou"></div>
<span class="coucou"></span>
<div></div>

CSS

div, span {
  display: block;
  width: 3em;
  height: 3em;
}
div {
  background-color: orange;
}

.coucou {
  div& {
    background-color: red;
  }
  span& {
    background-color: blue;
  }
  &:hover {
    background-color: green;
  }
}