JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://dev.sencha.com/deploy/ext-3.3.1/docs/resources/css/ext-all.css">
<script src="http://dev.sencha.com/deploy/ext-3.3.1/docs/resources/ext-base.js"></script>
<script src="http://dev.sencha.com/deploy/ext-3.3.1/docs/resources/ext-all.js"></script>
<div style="padding:10px;font-family:arial;font-size:12px;">
    <a id="test" href="javascript://">Click here to test</a>
</div>

JavaScript

Ext.override(Ext.Element, {
    myMethod: function() {
        this.on('click', function() {
            alert(this);
        });
    }
});

Ext.get('test').myMethod();