Mixed default and named exports in Node with ES5 syntax

Question

All my experience with exporting/importing modules has come in ES6 using export and import, where you can do something like this to have a single module export a default function as well as separate named functions.

// module.js export default mainFunction export { namedFunction }  // main.js import mainFunction from 'functions' mainFunction()  import { namedFunction } from 'function' namedFunction() 

However I can't figure out how to do this with ES5 style imports using module.exports and require. As far as I understand, I can export either a single default:

// module.js module.exports = function mainFunction() {}  // main.js const mainFunction = require('module.js') 

Or I can create named exports:

// module.js module.exports = {   namedFunction: function() {} }  // main.js const namedFunction = require('module.js').namedFunction 

But I can't do both. I thought I could maybe name one of the exports "default" like this, but it doesn't work

// module.js module.exports = {   default: function() {},   namedFunction: function() {} }  // main.js const mainFunction = require('module.js') // does not work const mainFunction = require('module.js').default // works, but not what I want const namedFunction = require('module.js').namedFunction 

How can I accomplish this dual default/named export with ES5?

Answer 1

You want to assign the value of module.exports to be your default function, and then put all the named exports as properties on that function.

const defaultFunction = () => { console.log('default!'); }; const namedFunction1 = () => { console.log('1!'); }; const namedFunction2 = () => { console.log('2!'); };  const myModule = module.exports = defaultFunction; myModule.namedFunction1 = namedFunction1; myModule.namedFunction2 = namedFunction2; 

Let's say that was in myModule.js. Then you can do this:

const myModule = require('./myModule'); myModule(); // Prints: 'default!' myModule.namedFunction1(); // Prints: '1!' 

Answer 2

Just re-assign exports to module.exports

Like:

//name.js  const NameType = {   foo: "bar", };  function Name(name) {   this.name = name; }  module.exports = Name; // assign default export to Name exports = module.exports; // re-assign exports to point it to the updated location.  exports.NameType = NameType; // now you can use named export as usual 

In another file you can import like:

const Name = require("./name"); const { NameType } = require("./name"); 

This works because by default module = { exports: {} } and exports = module.exports

Reference: Difference between "module.exports" and "exports" in the CommonJs Module System