JSFiddle - React, Tailwind, and code Playground

by Artem

HTML

<article></article>

CSS

h2::after{
  content: 'added';
}

JavaScript

var el = document.createElement('h2', 'isAttribute');
var el2 = document.createElement('h2');
document.getElementsByTagName('article')[0].appendChild(el);
console.log(el.getAttribute('is'));