JSFiddle - React, Tailwind, and code Playground

HTML

<div id="buttons">
<div id="box"></div>
<div id="content">content here</div>
</div>

CSS

#box {
position:absolute;
width: 10vw;
height: 10vw;
background-color: blue;
}

#content {
position:absolute;
width: 10vw;
height: 10vw;
background-color: red;
display: none;
}

JavaScript

$("#box").on("mouseover", function() {
	$("#content").show();
})