JSFiddle - React, Tailwind, and code Playground

HTML

<div class="outer">
  Your Content
</div>
<button>Hover me</button>

CSS

.outer {
  width: 100px;
  height: 100px;
  background-color: blue;
}

JavaScript

$(document).ready(function(){
    $("button").hover(function(){$(".outer").css("background-color", "lightblue");}, function(){$(".outer").css("background-color", "blue");} );
});