Esm: How to use this package together with flow-remove-types?

Created on 8 Oct 2019 · 8Comments · Source: standard-things/esm

I am trying to use flow-remove-types to remove types from node scripts before running them. I tried the following: node -r esm -r flow-remove-types/register index.mjs. This fails at type annotations. Is this an issue with this package or with flow-remove-types?

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bensampaio

Most helpful comment

Does it work with .js?

TrySound on 8 Oct 2019

👍2

All 8 comments

Does this work for you?

node -r flow-remove-types/register -r esm index.mjs

TrySound on 8 Oct 2019

No, I still get this error:

file:///typeHelper.mjs
export const isArray = (value: any): boolean %checks => {
                             ^

SyntaxError: Invalid or unexpected token

bensampaio on 8 Oct 2019

Does it work with .js?

TrySound on 8 Oct 2019

👍2

Yes :o If I change all imported files to js then it works. Is this an issue with esm or with flow-remove-types? And do you know what's missing? Thanks!

bensampaio on 8 Oct 2019

Ping! @TrySound why did you ask if it only works with .js? I still need a solution since changing all files to .js in the repo I am working on is not really realistic.

bensampaio on 10 Oct 2019

Both tools support mjs. I don't know what is the problem. But using mjs for source code was not a good idea :)

TrySound on 10 Oct 2019

👍1

I couldn't figure this out so I ended up changing the extensions of my files to .js and I switched from esm to @babel/node which fits my use case a lot better anyway.

bensampaio on 27 Nov 2019

The docs state that .mjs is restricted (no esm options or extra functionality extend to it).
Since ES module support was experimental in Node the functionality we extend to .js is not covered by .mjs.