Class 31 Combining Reducers - Alwynblake/seattle-javascript-401n12 GitHub Wiki

https://redux.js.org/api/combinereducers

• As your app grows more complex, you'll want to split your reducing function into separate functions, each managing independent parts of the state.

• The combineReducers helper function turns an object whose values are different reducing functions into a single reducing function you can pass to createStore.

• The resulting reducer calls every child reducer, and gathers their results into a single state object. The state produced by combineReducers() namespaces the states of each reducer under their keys as passed to combineReducers()

• Example:

• rootReducer = combineReducers({potato: potatoReducer, tomato: tomatoReducer})
• // This would produce the following state object
• {
• potato: {
• // ... potatoes, and other state managed by the potatoReducer ...
• },
• tomato: {

• // ... tomatoes, and other state managed by the tomatoReducer, maybe some nice sauce? ...
  

• }
• }