Modules

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Modules
​AirBNB JavaScript Style Guide: Modules​
10.1 Always use modules (import/export) over a non-standard module system.
10.2 Do not use wildcard imports.
10.6 In modules with a single export, prefer default export over named export.
Interpretation: multiple exports allowed
Confusing as hell
ESM vs CommonJS vs ES6
If using export default use import var from module:
export const foo = 42
export default 21;
If you want the 21, use import bar from './input';
import barImport from './input';
console.log(barImport); // 21
​
const barRequire = require('./input');
console.log(barRequire);
/*
{
    foo: 42,
    default: 21,
}
*/
Notes
export const types = () => {}
is different from
export function types() { }
​https://nodejs.org/api/modules.html​
​http://2ality.com/2014/09/es6-modules-final.html​
​https://stackoverflow.com/questions/40294870/module-exports-vs-export-default-in-node-js-and-es6​
Clearing Confusing
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Goals
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CommonJs
module.exports = ...
var module = require('module')
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AMD
​
define(['dependency1'], function(dependency1
Load synchronously
Asynchronous Module Definition
UMD
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Universal Module Definition
ESM
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​https://medium.freecodecamp.org/javascript-modules-a-beginner-s-guide-783f7d7a5fcc​
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