JSFiddle - React, Tailwind, and code Playground
HTML
<!DOCTYPE html>
<html lang="en">
<head>
<title>foo</title>
</head>
<body>
<p id="foo">
<sc-t>foo</sc-t>
</p>
<p id="is-p">
</p>
<p id="is-sc-t">
</p>
</body>
</html>
JavaScript
$('#is-p').text($('#foo').is('p') ? "it is a p" : "it is not a p");
$('#is-sc-t').text($('#foo').is('sc-t') ? "it is a sc-t" : "it is not a sc-t");