app Module
The App Framework provides simple MVC-like building blocks (models, model lists, views, and URL-based routing) for writing single-page JavaScript applications.
This module provides the following classes:
This module is a rollup of the following modules:
- 
                    
                        app-base
                    
                    Provides a top-level application component which manages navigation and views.
 - 
                    
                        app-content
                    
                    
Y.Appextension that provides pjax-style content fetching and handling. - 
                    
                        app-transitions
                    
                    
Y.Appextension that provides view transitions in browsers which support native CSS3 transitions. - 
                    
                        app-transitions-native
                    
                    Provides the implementation of view transitions for
Y.App.Transitionsin browsers which support native CSS3 transitions. - 
                    
                        lazy-model-list
                    
                    Provides the LazyModelList class, which is a ModelList subclass that manages plain objects instead of fully instantiated model instances.
 - 
                    
                        model
                    
                    Attribute-based data model with APIs for getting, setting, validating, and syncing attribute values, as well as events for being notified of model changes.
 - 
                    
                        model-list
                    
                    Provides an API for managing an ordered list of Model instances.
 - 
                    
                        model-sync-rest
                    
                    An extension which provides a RESTful XHR sync implementation that can be mixed into a Model or ModelList subclass.
 - 
                    
                        router
                    
                    Provides URL-based routing using HTML5
pushState()or the location hash. - 
                    
                        view
                    
                    Represents a logical piece of an application's user interface, and provides a lightweight, overridable API for rendering content and handling delegated DOM events on a container element.
 - 
                    
                        view-node-map
                    
                    View extension that adds a static
getByNode()method that returns the nearest View instance associated with the given Node (similar to Widget'sgetByNode()method). 
