JSFiddle - React, Tailwind, and code Playground

JavaScript

new Ext.Panel({
        html: 'Here I am',
        title: 'Title',
        width: 400,
        height: 500,
        listeners: {
            dblclick : {
                fn: function() {
                     console.log("double click");
                },
                element: 'el'
            }    
        },
        renderTo: Ext.getBody()
    });