SyntaxError: The requested module 'ttn' does not provide an export named 'data'

[sbrl]

Currently if I use this package with Node.js, I get the following error:

file://path/to/Msc-Summer-Project/server/ttn-app-server/TTNAppServer.mjs:3
import { data as ttn_data } from 'ttn';
         ^^^^
SyntaxError: The requested module 'ttn' does not provide an export named 'data'
    at ModuleJob._instantiate (internal/modules/esm/module_job.js:93:21)
    at async ModuleJob.run (internal/modules/esm/module_job.js:108:20)
    at async Loader.import (internal/modules/esm/loader.js:128:24)

I'm executing my program like this: node --experimental-modules ./server/index.mjs

....I think there's a packaging error. Inspecting index.js reveals that it's using some custom exports variable, and not an ES6 export { example_function }; statement as it should be, or even a legacy module.exports = { /* ..... */ }; - hence Node.js doesn't recognise it.

Edit: Oh yeah, here are my software version details:

$ npm --version
6.9.2
$ node --version
v12.5.0

[johanstokking]

Thanks for reporting.

You mean this is wrong?

[sbrl]

Huh, that looks completely different to what I'm seeing in the package I've installed from npm, @johanstokking! Here's what I'm seeing: index.js.log (renamed to .log so that GitHub accepts it)

Specifically, this:

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.account = exports.data = exports.application = exports.services = exports.Discovery = exports.ApplicationClient = exports.wildcard = exports.DataClient = exports.key = exports.HandlerClient = undefined;

....

var data = exports.data = function () {
  var _ref3 = (0, _asyncToGenerator3.default)( /*#__PURE__*/_regenerator2.default.mark(function _callee3(appID, accessKeyOrToken, opts) {
    var handler;
.....

[johanstokking]

Hmm 🤔 the published version may be transpiled weirdly.

What if you clone this repo and reference locally?

If you have ideas to fix this, that would be very much welcomed.

[sbrl]

@johanstokking After cloning it to a subfolder inside node_modules and running the following test program:

"use strict";

import { data } from './node_modules/node-app-sdk/src/index.js';

console.log(data);

....I get this error:

$ node --experimental-modules index.mjs 
(node:7124) ExperimentalWarning: The ESM module loader is experimental.
file:///tmp/test/index.mjs:1
import { data } from './node_modules/node-app-sdk/src/index.js';
         ^^^^
SyntaxError: The requested module './node_modules/node-app-sdk/src/index.js' does not provide an export named 'data'
    at ModuleJob._instantiate (internal/modules/esm/module_job.js:93:21)
    at async ModuleJob.run (internal/modules/esm/module_job.js:108:20)
    at async Loader.import (internal/modules/esm/loader.js:134:24)

For reference, I'm attempting to import src/index.js.

If I change the above test script to import the default export instead, I get this error:

$ node --experimental-modules index.mjs 
(node:8388) ExperimentalWarning: The ESM module loader is experimental.
/tmp/test/node_modules/node-app-sdk/src/index.js:6
import { HandlerClient } from "./handler"
       ^

SyntaxError: Unexpected token {
    at Module._compile (internal/modules/cjs/loader.js:720:23)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:787:10)
    at Module.load (internal/modules/cjs/loader.js:643:32)
    at Function.Module._load (internal/modules/cjs/loader.js:556:12)
    at internal/modules/esm/translators.js:87:15
    at Object.meta.done (internal/modules/esm/create_dynamic_module.js:48:9)
    at file:///tmp/test/node_modules/node-app-sdk/src/index.js:9:13
    at ModuleJob.run (internal/modules/esm/module_job.js:111:37)
    at async Loader.import (internal/modules/esm/loader.js:134:24)

....I'm confused.

[Minyanaing]

Instead of "import", use const and require. const { data, application } = require('ttn');

[sbrl]

In theory that would work around the issue @Minyanaing, the but specific problem here is that it doesn't work with es6 modules - i.e. the import export syntax.

[johanstokking]

@Minyanaing @sbrl can you make a PR?

[sbrl]

@johanstokking I would investigate doing so, but read this. It's an announcement about es6 modules on npm.