Import/Export objects in JS

import-export.results.js

module.exports = {
  key1: () => 'Key 1',
  key2: () => 'Key 2',
};

import all, { key1 } from 'index';

// Result
// all = { key1, key2 }
// key1 = () => {}

export default {
  key1: () => 'Key 1',
  key2: () => 'Key 2',
};

import all, { key1 } from 'index';

// Result
// all = { key1, key2 }
// key1 = undefined

export {
  key1: () => 'Key 1',
  key2: () => 'Key 2',
};

import all, { key1 } from 'index';

// Result
// all = undefined
// key1 = () => {}

const File1 = () => 'File 1';
const File2 = () => 'File 2';

// index.js
export { default as File1 } from './File1';
export { default as File2 } from './File2';

import All, { File1, File2 } from 'index';

// Result
// all = undefined
// File1 = () => {}
// File2 = () => {}

const File1 = () => 'File 1';
const File2 = () => 'File 2';

// index.js
export { default as File1 } from './File1';
export { default as File2 } from './File2';

import * as all from 'index';

// Result
// all = { File1 = () => {}, File2 = () => {} }