JSFiddle - React, Tailwind, and code Playground

JavaScript

PuffButton = Ext.extend(Ext.Button,{
		constructor: function(config){
			PuffButton.superclass.constructor.apply(this,arguments);
			console.log("111111");
            this.on('click',function(){this.el.puff();},this);
		}
	});
var puff = new PuffButton({text: 'Puff', renderTo:Ext.getBody()});