Ts-node-dev: Can ts-node-dev be used with esm?

[karensg]

I can run it with ts-node itself with
node -r esm -r ts-node/register...

But I assume that at this moment ts-node-dev can not be combined with esm?

[steida]

I am using it in https://github.com/este/este and it works. But note there is a bug, so version must be fixed. Check esm issues.

[wclr]

I'm not sure, but probably should.

[karensg]

How would you transfrom this to ts-node-dev?
node -r esm -r ts-node/register/transpile-only src/index.ts

I don't see the register options for ts-node-dev library.

[wclr]

-r should work, it is node's option, try:
ts-node-dev -r esm --transpile-only src/index.ts

[karensg]

This does not work unfortunately as esm needs to be loaded before ts-node. Could we add a check for that logic in this library?
Link to related discussion: https://github.com/TypeStrong/ts-node/issues/722

[wclr]

@karensg
Check it with the latest version, I inserted the check.

[karensg]

Thanks for your help!

Tried with v37, the flag does not seem to influence anything. Using what you suggested:
ts-node-dev -r esm --transpile-only src/index.ts

Getting these kind of errors:

import { readFileSync } from 'fs';
       ^
SyntaxError: Unexpected token {

[wclr]

@karensg
Should be working now.

[steida]

Interesting. New version does not work with the old versions of "esm": "3.2.20" but works with the last version of esm. Thank you. It's fixed for me.

[karensg]

It works for me too. Absolute madness!
Thanks!

[wclr]

Interesting. New version does not work with the old versions of "esm": "3.2.20" but works with the last version of esm. Thank you. It's fixed for me.

Well it could be handled, but don't think it is very relevant.

[alesso-x]

How do I run ts-node-dev with ts-node/esm? related issue https://github.com/TypeStrong/ts-node/issues/1007.

I have a sample repo where I'm trying to use top level await with scripts for ts-node and ts-node-dev. The ts-node version is run by node --loader ts-node/esm. I also tried ts-node-dev -r esm but that did not work.

[wclr]

@alesso-x
I'm not sure how ESM loader works and how it should be configured bu this test is passing.