JSFiddle - React, Tailwind, and code Playground

HTML

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>children demo</title>
  <style>
  body {
    font-size: 16px;
    font-weight: bolder;
  }
  span {
    color: blue;
  }
  p {
    margin: 5px 0;
  }
  </style>
  <script src="https://code.jquery.com/jquery-1.10.2.js"></script>
</head>
<body>
 
<p>Hello (this is a paragraph)</p>
 
<div><span>Hello Again (this span is a child of the a div)</span></div>
<p>And <span>Again</span> (in another paragraph)</p>
 
<div>And One Last <span>Time</span> (most text directly in a div)</div>
 
<script>
$( "div" ).children().css( "border-bottom", "3px double red" );
</script>
 
</body>
</html>