리액트 네이티브 유데미 강의 섹션9~

react-native init auth

npm install --save firebase

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섹션11 redux

reducer: a function that returns(produce) some data

action: an object that tells the reducer how to change its data

ex. 'asdf'를 array로 바꿀 것.

(type: 'split')

state: application data. data for our app to use.

store: an object that holds the application's data.

Login 과정

User Types Sth 

-> Call Action Creator with new text 

-> Action Creator returns an action

-> Action sent to all reducers

-> Reducer calculates new app state

-> State sent to all components

-> Components render with new

-> Wait for new change ->