JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://ajax.microsoft.com/ajax/jquery.validate/1.7/jquery.validate.js"></script>
<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.4/themes/ui-lightness/jquery-ui.css">
<div class="anc-style" onclick="window.open('./view.php?a=foo')"></div>

JavaScript

var el = document.getElementsByTagName('div')[0];

var attr = 'onclick';
var result = el.getAttribute(attr) || el[attr] || null;
alert(result);