JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://rawgit.com/sergei-startsev/c87cb88ab76e066dd37056783ca7ac74/raw/c08ba7df10a6d0cdad2f36464388394f8e5be7fd/react.development.js"></script>
<script src="https://rawgit.com/sergei-startsev/f3d29b4a2acb722e251021b249c6de26/raw/303c181824c7095866370ee3df42ccf88af3350c/react-dom.development.js"></script>
<script src="https://rawgit.com/eu81273/jsfiddle-console/master/console.js"></script>
<div id="container"></div>

Babel + JSX

function log(){
	const descr = Object.getOwnPropertyDescriptor(window, 'event');
  if (typeof descr === 'undefined'){
  	console.log('undefined');
  }else {
  	console.log(JSON.stringify(descr));
  }
}

console.log('Global `window.event` descriptor before/after dispatching a fake event:');

log();
ReactDOM.render(
	<h1>React Component</h1>,
  document.getElementById('container')
);
log();