layout.coffee

class PostDashboardView extends Marionette.Layout
  template: -> "<div id='posts-region'></div><div id='new-post-region'></div>"
  regions:
    postsRegion: '#posts-region'
    newPostRegion: '#new-post-region'

layout = new PostDashboardView
postsView = new PostsView(collection: new Posts)
newPostView = new NewPostView

layout.render()
layout.postsRegion.show(postsView) # backbone: @$('#posts-region').html(postsView.render().$el)
layout.newPostRegion.show(newPostView)
layout.postsRegion.close() # backbone: postsView.remove()
layout.newPostRegion.show(new SomeOtherView) # closes newPostView and renders SomeOtherView