JSFiddle - React, Tailwind, and code Playground

HTML

<div class="app">
    <a href="#">(h)over here!</a>
</div>

<div class="frame">
</div>

CSS

.app a:hover -> .frame {
    background-color: yellow;
}

.frame {
    background-color: blue;
    width: 300px;
    height: 300px;
}