The following works perfectly in extjs6
Ext.define('MyThing', {
extend: 'Ext.panel.Panel',
items: [{
xtype: 'combo',
store: {
fields: 'value',
data: [
{value: 'ManagerX'},
{value: 'OwnerX'},
{value: 'FarmerX'},
{value: 'GovnerX'}
]
},
displayField: 'value',
valueField: 'value',
}]
})
However if I try this in extjs4 the combo elements do not render. They just render empty space. See fiddle :
https://fiddle.sencha.com/#fiddle/1i17
Why does this not work in extjs4?