JSFiddle - React, Tailwind, and code Playground

HTML

<h3 show-content="35">PS elementum justo ligula</h3>
<div>elementum justo ligula, interdum scelerisque.
<button>Close</button>

CSS

h3:after {
font-family: 'ElegantIcons';
content: attr(show-content);
float:left;
content:">";
}

JavaScript

$("h3").click(function () {
$(this).attr('show-content','38');
$(this).next("div").slideToggle("slow");
});