JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html>
<head>

</head>

<body>
<div></div> 
<div>
    <p> pragraph 2</p>
    <p> pragraph 3</p>
    <p> pragraph 4</p>
</div>  


</body>
</html>

CSS

div:empty
{
  width:100px;
height:20px;
background:red;
}