Google Cloud Functions, Node JS 8.9.x (LTS) and KOA library

Question

How can I use Koa library, the express replacement, in Cloud Functions?

I know KOA use all great ES2017 and make more use of Async use of JavaScript.

or it

Answer 1

Use babel:

index.js:
----------=

'use strict';

require('@babel/register')
require('babel-polyfill')
const http = require('http')

const createApp = require('./app/app.js')
const handle = createApp().callback()

if (process.env.IS_LOCAL_DEPLOYMENT) {
    // to use same code in local server
    http.createServer(handle).listen(3000)
} else {
    module.exports.http = (request, response) => {
        handle(request, response)
    };
}

app.js:
--------

'use strict';

const Koa = require('koa')

module.exports = () => {
    const app = new Koa()

    app.use(......)

    return app
}

package.json
------------

  "scripts": {
       .
       .
    "start": "export IS_LOCAL_DEPLOYMENT=true && node index"
       .
       .
  }