Creating a Container with ExtJS.

Container.js

var panel = Ext.create('Ext.panel.Panel', {
	cls: 'my-panel',
	title: 'Filters',
	items: [
		{
			xtype: 'datefield',
			fieldLabel: 'Start date'
		},
		{
			xtype: 'datefield',
			fieldLabel: 'End date'
		}
	],
	renderTo: Ext.getBody()
});