JSFiddle - React, Tailwind, and code Playground

HTML

<button id="test">TestIt</button>
<ul id="feed">
</ul>

JavaScript

var testXML = '<?xml version="1.0" encoding="ISO-8859-1" standalone="no" ?> <rss version="2.0" xmlns:admin="http://webns.net/mvcb/" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/elements/1.1/"  xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"  xmlns:sy="http://purl.org/rss/1.0/modules/syndication/">  <channel>	<title>FlatpanelsDK - Nyheder</title>   	<link>http://www.flatpanels.dk/nyhedsarkiv.php</link>  	<description>Nyheder fra FlatpanelsDK</description>   	<managingEditor>[email protected] (Rasmus Larsen)</managingEditor>   	<webMaster>[email protected] (Rasmus Larsen)</webMaster>   	<language>da</language> 	<copyright>Copyright 2005-2015, Flatpanels.dk</copyright>	<item> 	<title><![CDATA[Svenske Plejmo lanceres som filmtjeneste i Danmark]]></title>   	<pubDate>Thu, 23 Apr 2015 12:31:01 +0400</pubDate>   	<link>http://www.flatpanels.dk/nyhed.php?subaction=showfull&amp;id=1429777596&amp;rss</link>	<guid isPermaLink="true">http://www.flatpanels.dk/nyhed.php?subaction=showfull&amp;id=1429777596&amp;rss</guid>	<description><![CDATA[ Plejmo er en online filmbutik, hvor man lejer film enkeltvis fra et katalog p� 8000 titler. Tjenesten lanceres nu i Danmark med priser fra 3 kroner og op. Det er en tidligere Spotify-direkt�r, der st�r i spidsen.	<br><img src="http://www.flatpanels.dk/billeder/plejmo-1.jpp" />]]></description> 	<author>[email protected] (Rasmus Larsen)</author>     </item> 	<item> 	<title><![CDATA[YouTube fjernet p� �ldre Smart TV og Apple TV]]></title>   	<pubDate>Wed, 22 Apr 2015 11:37:01 +0400</pubDate>   	<link>http://www.flatpanels.dk/nyhed.php?subaction=showfull&id=1429687929&rss</link>	<guid isPermaLink="true">http://www.flatpanels.dk/nyhed.php?subaction=showfull&amp;id=1429687929&amp;rss</guid>	<description><![CDATA[ For et par m�neder siden begyndte Google at informere brugerne om, at YouTube-app\'en ville blive fjernet den 20. april. App\'en forsvinder ogs� p� 2. generation Apple TV,...