ReasonJun

// key.js export const birthKey = Symbol('Date of birth'); export const emailKey = Symbol('Emails'); // youjun.js import { birthKey, emailKey } from './key'; export default { firstName: 'youjun', lastName: 'park', age: 22, [birthKey]: new Date(1985, 11, 16, 17, 30), [emailKey]: ['thiehis@gmail.com'], }; // main.js import youjun from './youjun.js'; import { birthKey, emailKey } from './key.js'; c..