title: Why and when to use default export over named exports in es6 Modules?
body: <p>I have referred all the questions in stackoverflow. 
  But none of the suggested why and when to use default export.</p>
  
  <p>I just saw that default can be metioned  "When there is only one export in a file"</p>
  
  <p>Any other reason for using default export in es6 modules?</p>