Conclusion and Summary

For a supposedly simple application, this chapter was longer than you probably anticipated. But that’s fine. You’re now equipped with even greater knowledge on how Redux works.

Here are a few things you learned in this chapter:

• Unlike setState() in pure React, the only way you update the state of a Redux application is by dispatching an action.

• An action is accurately described with a plain Javascript object, but it must have a type field.

• In a Redux app, every action flows through the reducer. All of them.

• By using a switch statement, you can handle different action types within your Reducer.

• Action Creators are simply functions that return action objects.

• It is a common practice to have the major actors of a redux app live within their own folder/directory.

• You should not mutate the state received in your Reducer. Instead, you should always return a new copy of the state.

• To subscribe to store updates, use the store.subscribe() method.