defaultimport.js

import A from './module'; 
import AA, { doSomething } from './module';

A.doSomething() === doSomething()
AA.doSomethingElse()

//////////////////////////////////

export default const publicApi = {
  doSomething() {
    ...
  },
  doSomethingElse() {
    ...
  }
}

namedimports.js

import { doSomething, doSomethingElse, a } from './module';
import * as A from './module';

doSomething() === A.doSomething()
a === A.a;

///////////////////////////////////

export function doSomething() {
  ...	
}

export function doSomethingElse() {
  ...	
}

export const a = "..."