rootElementString|Elementpublic
Defined in packages/ember-application/lib/system/application-instance.js:426
If present, overrides the application's rootElement property on the instance. This is useful for testing environment, where you might want to append the root view to a fixture area. In non-browser mode, because Ember does not have access to jQuery, this options must be specified as a DOM Element object instead of a selector string. See the documentation on Ember.Applications's rootEl