Backbone is a library that helps in creating and following MVC architecture in web applications. The basic idea of Backbone is to organize your interface into logical views, backed by models, each of which can be updated independently when the model changes, without having to redraw the page. For more information about Backbone, see http://backbonejs.org.
Some key concepts are as follows:
Contains data, and most of the logic related to this data.
Used to represent the state of the corresponding model. A backbone view actually behaves like a controller, listening to user interface events like user clicks, or to model events (like data changed), and modifies the user interface as appropriate.
A wrapper template which has placeholders populated by the model.
Contains several individual components. Each component:
When a component is initialized, following objects are created:
In Backbone view, there is an event map which maps the various events that can arise due to user interface interactions with a corresponding handler. This mapping is initiated once a component is initialized.
When a view is initialized, the view calls its corresponding model to fetch data from server. Once all data required by a view is available, the view renders the data in the format specified by the HTML template. Multiple views may share same model for communication.