For what do I use the appProperty property?

Question

I recently stumpled over the appProperty within the the Ext.app.Application class and wondered why would I use it. I would require access to App instance anyway to then access a variable that again contains the instance? Maybe I am stupied but for what is this property?

Answer 1

I guess you have a misunderstanding here; The name property just defines a namespace of the Application along with a getter Method for it (getApplication()) but it will not provide you with the current instance of that application unless you call the getter or use the new appProperty.

Lets say you have the following application

Ext.application({
    name: 'App',
    appProperty: 'instance',
    launch: function() {
        // some more code
    }
});

the you can access this application from any Component by calling either

App.getApplicatio();

or

App.instance

Where the second will be bit faster cause it is no method call and for sure you can define the name of this property. So I guess you see this property is quite useful!

Note that a namespace is always a object in javascript. That is the reason why you are able to place properties into it.