JSFiddle - React, Tailwind, and code Playground

HTML

<div class="sample">
</div>
<div class="sample">
</div>

CSS

.sample {
    width:200px;
    height:200px;
    background: #aaa;
}

JavaScript

$(".sample").hover(
    function () { $(this).css("background", "yellow") },
    function () { $(this).css("background", "")       }
);