The code i try to use and test is shown below;
Ext.Loader.setConfig({
enabled: true


});


Ext.application({
name: 'microfilm',


launch: function () {


alert('hi');


}
})

Is anyone can help with it since i try to create an app when i try to test with the code i write below and it gives me the Uncaught ReferenceError: Ext is not defined app.js:1. Thank you.