JSFiddle - React, Tailwind, and code Playground

JavaScript

/*******************************/
//My Controller
/******************************/

Ext.define('MyApp.controller.NotificationController',{
	extend: 'Ext.app.Controller',
	stores: ['NotificationStore'],
	views: ['MyApp.view.NotificationView'],
	//views: 'NotificationView',
	
	init: function(){
        this.control({
				'#notificationViewInner': {
					render: function(){
                        var weekNotifications = Ext.getCmp('notificationViewInner').query('>container>container')[1];
                        weekNotifications.update("hello");
                    }
                }
        })
    }
                    
});
		

/*******************************/
//My View
/******************************/
Ext.define("MyApp.view.NotificationView", {
    extend: 'Ext.panel.Panel',
    renderTo: Ext.getBody(),
    alias: 'widget.notifications',
    id: 'notificationViewInner',
    layout: {type: 'vbox',align: 'stretch'},
    
    //html: 'Notifications Here!'
    items:[{
      //Week
    	xtype: 'container',
    	flex: 1,
    	margins: '5 5 5 5',
    	layout: {type: 'vbox', align: 'stretch'},
    	items: [{
    		//Heading
    		xtype: 'container',
    		height: 20,
    		//flex: 1,    		
    		html: 'This week'
    	},
    	{
/****************************************************/
//I am trying to get into this block
/****************************************************/
    		//Show Notifications
    		xtype: 'container',
    		height: 20,
    		//flex: 1,
    		html: 'Notifications here'
    	},
    	{
    		//Content
    		xtype: 'container',
    		cls: 'weekContentNotification',
    		//height: 40,
    		flex: 1,   
    		margin: '0 0 0 35',
    		layout: {type: 'vbox', align: 'stretch'},
    	}]
    },
    {
    	xtype: 'container',
    	flex: 1,
    	margins: '5 5 5 5',
    	layout: {type: 'vbox',align:'stretch'},
    	items: [{
    		xtype: 'container',
    		height: 20,	
    		html: 'This month'
    	},
    	{
    		xtype: 'container',
    		height: 20,
   ...