Import dropbox-sdk to companion

[Flodo]

Hello everyone, i try to create an app which uses dropbox (my setup is vscode + cli). Therefore i want to use the dropbox sdk in the companion-part. I have install the npm-package successfully and import the dropbox-object like:

import { Dropbox } from 'Dropbox';

But when i try to build the app i got the following error: 

[error][companion] companion\index.ts:3,9 Error: 'Dropbox' is not exported by node_modules\Dropbox\es\index.es6.js
Details:
code: MISSING_EXPORT
url: https://rollupjs.org/guide/en#error-name-is-not-exported-by-module-
frame:
1: import { Dropbox } from 'Dropbox';
^

Because of the lack of documentation how to import a third party library i am not sure if there is more to do. The only thread i found was https://community.fitbit.com/t5/SDK-Development/My-example-of-using-third-party-ES-modules-lodash-re... and here is lookslike i have to copy the source to a special directory?! Hope someone can help, thx.

[Flodo]

Ok after lot of trail and error coding, i am a step futher.

I changed the index.es6.js

//uncomment this
// export default {
//   Dropbox: Dropbox,
//   DropboxTeam: DropboxTeam
// };

//and add this
export {
  Dropbox as Dropbox
}

I assume that the dropbox sdk and fitbit uses different version from rollup hence the error. Now i can compile and install the app. But i got the next error 😕

Companion: ReferenceError: babelHelpers is not defined
  ? at node_modules/dropbox/es/rpc-request.js:153,3
  ? at node_modules/dropbox/es/rpc-request.js:129,26

Maybe this time someone here has a clue for me to solve this issue?

[Flodo · Accepted solution]

Ok,found a solution...if you go to the '...\node_modules\dropbox\package.json', remove the line

'"module": "es/index.es6.js"'.
It looks like it is a flag for bundler like rollup.js to determine which files are used (info-at-stackoverflow).
After that i could compile and get no error if i use the sdk. Hope this will save futher developers some time.