JSFiddle - React, Tailwind, and code Playground

HTML

<main>
  <article>
    <div class="highlight-on-hover">

    </div>
    <div>

    </div>
    <div class="highlight-on-hover">

    </div>
  </article>
</main>

CSS

main, article, div {
  border: 1px solid lightgrey;
  padding: 30px;
}

.highlight-on-hover:hover {
  border-color: red;
}