emberjs/ember.js — pull request #1046 by c0urg3tt3 (2012-06-21 02:01:43+00:00)
Title: outlet support subclassed Ember.ContainerView

allow the developper to pass a view for settings html for outlet helper.

App.MainView = Ember.ContainerView.extend({
elementId: "main",
ariaRole: "main"
})

{{outlet App.MainView}}

instead of

{{outlet elementId="main" ariaRole="main"}}

two way to achieve the same things, each can serve different usage.