React Redux

state 관리
Action: plain JavaScript object
- a type property and often some sort of payload.
Reducer:
- a function that takes a state object and an action...
- it returns a new state.

export const exampleReducer = (state: State, action: Action) => {
  switch (action.type) {
    case 'SET_COUNT':
      return {
        ...state,
        count: action.payload
      };
    default:
      return state;
  }
};

ref

https://decembersoft.com/posts/recommended-react-typescript-libraries/