jdjkelly

export {
  createStore,
  combineReducers,
  bindActionCreators,
  applyMiddleware,
  compose
}

jdjkelly

export default function createStore(reducer, preloadedState, enhancer) {
  ...
  return {
    dispatch,
    subscribe,
    getState,
    replaceReducer,
    [$$observable]: observable
  }
}

jdjkelly

let currentReducer = reducer
let currentState = preloadedState
let currentListeners = []
let nextListeners = currentListeners
let isDispatching = false

jdjkelly

declare type Reducer<S, A> = (state: S, action: A) => S;

jdjkelly

import { createStore } from 'redux'; // CommonJS: const createStore = require('redux')['createStore']
const app = createStore((state, action) => { return state });

jdjkelly

import { createStore } from 'redux';
const app = createStore((state, action) => { return state }, { booted_at: new Date() });

jdjkelly

export default function createStore(reducer, preloadedState) {
  let state = preloadedState
  let listeners = []
  let dispatching = false

  function getState() {
    return state
  }
  
  function dispatch(action) {

jdjkelly

...

let currentState = preloadedState  

...

function getState() {
  return currentState
}

jdjkelly

function dispatch(action) {
  if (!isPlainObject(action)) {
    throw new Error(
      'Actions must be plain objects. ' +
      'Use custom middleware for async actions.'
    )
  }

  if (typeof action.type === 'undefined') {
    throw new Error(

jdjkelly

declare type Dispatch<A: { type: $Subtype<string> }> = (action: A) => A;