redux_notes12.js

// instantiate the store
const store = createStore(todoApp, window.STATE_FROM_SERVER)

// import the action creators
import { addTodo, completeTodo, setVisibilityFilter }

// `store.subscribe()` takes an anonymous function that will be invoked
// everytime the store state changes.  It returns another method, which when
// invoked, will stop listening.
let unsubscribe = store.subscribe(() =>
  console.log(store.getState())
)

// dispatch the actions
// under the hood, the store will call the reducer function you defined
// the store will pass in the current state and the dispatched action
// to the reducer
store.dispatch(addTodo("Write letter of apology to mime"))
store.dispatch(addTodo("Cure athlete's foot in 3rd world countries"))
store.dispatch(completeTodo(0))
store.dispatch(completeTodo(1))
store.dispatch(setVisibilityFilter("SHOW_COMPLETED")

// stop listening to state changes
unsubscribe()