How create a module with asynchronous exports in NodeJS with ES6 - node.js

Question

I want to create a module (install in node_modules) for my projects which call the same API. But when I export my async function I get an error :
index.js Unexpected token (3:21)
You may need an appropriate loader to handle this file type.
Index.js is my module file.
Here's example code:
export default async function({path, method = 'GET', body}, userToken = null, contentType = 'application/json') {
// some code here ...
}
And in my project I import like this :
import invokeApi from 'my_sdk';

Answer 1

It seems that there is an issue with your build configuration on the consumer code side. You must enable async/await when consuming async APIs as it requires regeneration runtime (or install Node 7.6 or later as it brings native async/await support).
If you use this code on the web you might probably need to import 'babel-polyfill' in the entry point file (probably main.js, app.js or index.js) and set up Webpack to use Babel to transpile your code.
Works like a charm using babel-node with following "presets": ["es2015", "stage-0"]:
asyncModule.js
const sleep = async duration =>
new Promise(resolve => setTimeout(resolve, duration))
export default async function({path, method = 'GET', body}, userToken = null, contentType = 'application/json') {
await sleep(500)
return "Hello :)"
}
index.js
import asyncExample from './asyncModule'
const main = async () => {
const result = await asyncExample({path: '/', body: ''});
console.log(result)
main();
npm start
"start": "babel-node --presets es2015 index.js"