title: Import from folder ES6
body: <p>I'm studying JS and I have something like this.</p>
  
  <pre><code>//all inside folder reducers
  
  //reducer1.js
  export default reducer1
  
  //reducer2.js
  export default reducer2
  
  //index.js
  import reducer1 from './reducer1'
  import reducer2 from './reducer2'
  //then combine reducer
  export default index
  
  //outside folder reducers
  import reducer from './reducers'
  </code></pre>
  
  <p>since <code>./reducers</code> is just a folder and there is 3 file with 3 export default inside, I don't understand how this could work ? How does it know which export default in the folder will be imported ?</p>
  
  <p>Thank you.</p>