redux_notes10.js

import { createStore } from 'redux'
import todoApp form './reducers'

// we create the store the store by invoking `createStore` with
// the root reducer.
const store = createStore(todoApp)

// `createStore` also takes a second option argument that is the initial state of the store.
const initialState = {
  visibilityFilter: "SHOW ALL",
  todos: []
}
const store = createStore(todoApp, initialState)