Cannot use ES6 import syntax in node

[Andy Bulka]

The recommended import syntax

import { Midi } from '@tonejs/midi'

works fine in the browser via snowpack or vite, however it fails via node v16.13.1. Shouldn't it work in node, which now supports ES6 import syntax as long as you put everything in .mjs files?

Repro

npm install @tonejs/midi

Then create a file main.mjs

import { Midi } from '@tonejs/midi'
console.log(Midi)

Running with node main.mjs causes the error

import { Midi } from '@tonejs/midi'
         ^^^^
SyntaxError: Named export 'Midi' not found. The requested module '@tonejs/midi' is a CommonJS module, which may not support all module.exports as named exports.
CommonJS modules can always be imported via the default export, for example using:

import pkg from '@tonejs/midi';
const { Midi } = pkg;

    at ModuleJob._instantiate (node:internal/modules/esm/module_job:124:21)
    at async ModuleJob.run (node:internal/modules/esm/module_job:181:5)
    at async Promise.all (index 0)
    at async ESMLoader.import (node:internal/modules/esm/loader:281:24)
    at async loadESM (node:internal/process/esm_loader:88:5)
    at async handleMainPromise (node:internal/modules/run_main:65:12)

Also tried in the very latest node v18.0.0 and got the same error.

Interestingly the two step workaround suggested by node

import pkg from '@tonejs/midi';
const { Midi } = pkg;

works OK for node, but when serving the same file in a browser via vite causes an "Cannot destructure property 'Midi' of 'pkg' as it is undefined." error. Interestingly, serving the same file via snowpack works ok.

[Andy Bulka]

I finally found the following syntax which now happily works for node, vite and snowpack.
The secret seems to be to import * as pkg and not doing what node says which is merely to import pkg.

import * as pkg from '@tonejs/midi';
const { Midi } = pkg;

In other words, the same .mjs module can be run in node, e.g. running a mocha test or the module can be used as part of a browser based app and be served via vite or snowpack.