• It is an application architecture that Facebook makes use of internally for constructing the client-side web application with React .
• It is a programming concept, where the data is a Unidirectional Data Flow model.
• The project has dynamic data, where it is useful.
• We need to maintain the data updated in an effective
• The runtime errors become reduced.

• In this application, there are four major roles:
  • Action
  • Dispatcher
  • Store
  • View

Action:

• In this creator an action from method parameter,assign it a type and then provide to a dispatcher.

Dispatcher:

• It sends every action to all stores via callbacks that have registered with it.

Store:

• It updates themselves in response to an action ,emit the change event to alert the controller view.

View:

• It retrieves new data from the stores and provides the new data to their descendants in the component tree.