使用index.js从'/ folder'导入javascript

我注意到有几个案例我见过以下内容：

I've noticed a few cases where I've seen something like the following:

// /reducers/reducer1.js
export default function reducer1(state = {}, action){
  // etc...
}
  
// /reducers/reducer2.js
export default function reducer2(state = {}, action){
  // etc...
}

// /reducers/index.js
import { combineReducers } from 'redux';
import reducer1 from './reducer1';
import reducer2 from './reducer2';

export default combineReducers({
  reducer1,
  reducer2
})
  
// /store.js
import masterReducer from './reducers';

export default function makeStore(){
  // etc...
}

注意我们调用的最后一个文件从'./reducers'中导入masterReducer - 有些人似乎认为这应该导入 index.js文件中的默认导出。

Notice the last "file" where we call import masterReducer from './reducers' - A few people seem to believe this should import the default export from the index.js file.

这实际上是规范的一部分？ - 我的解释/问题是，这是许多人使用WebPack v1的结果，它将 import 语句翻译成CommonJS风格的需要陈述？或者这将在WebPack v2中以官方 import / export 支持？

Is this actually part of the specification? - my interpretation/question is that this is the result of many folks using WebPack v1 which translates import statements into CommonJS-style requires statements? Or will this break in WebPack v2 with "official" import/export support?