Previous articles describe the setup and the ecosystem. This article discusses some key features.
In particular, notice the store.
Notice the reducers and the middleware.
Notice the reducers are combined.
Notice how the action defines the method and its signature.
Notice how the reducer handles the state of the help property.
Notice the various patterns for altering state.
fetchScoreSuccess and fetchScoreError are both defined as actions.
success sets the state from the server.
no real error handling as the error is not important.