Summary: Redux Fundamentals

Redux principles

Redux is based on the following three principles:

• A Redux app has a single source of truth called the store.

• The store is read-only and can only be changed by dispatching actions.

• Changes are made using pure functions called reducers.

Redux architecture

• We should keep our entire app’s state in a single JavaScript object called store.

• Our app’s components/views subscribe to the store for the required data.

• When the state needs to get updated through user interactions, the component/view dispatches an action. The action contains information about the new data.

• The action forwards the information to a reducer function. The reducer uses that information to modify the state.

• Since the component/view has already been subscribed to the store, it gets updated automatically with the new data.