Export ts-node/esm-register

[jlenon7]

Register ts-node/esm loader programmatically using register fn.

See issue #2072

[klippx]

This is great, we will get rid of

(node:2649) ExperimentalWarning: `--experimental-loader` may be removed in the future; instead use `register()`:
--import 'data:text/javascript,import { register } from "node:module"; import { pathToFileURL } from "node:url"; register("ts-node/esm", pathToFileURL("./")); register("extensionless", pathToFileURL("./"));'

if we use the --import ts-node/esm instead of --loader ts-node/esm for Node 20.x projects

[TheUnlocked]

Make sure to add esm-register.mjs to the files list in package.json.

[kkolinko]

Regarding the proposed patch:

1. The first argument to register(): What is the point of calling pathToFileURL() on it? Why one would want to convert a relative path to a file:// URL?

   (I would understand if it were an absolute path, resulting in an absolute URL. And in that case the second argument to register() could be omitted. But why for a relative one? register() is able to resolve relative paths relative to its second argument - that is the purpose of the second argument of register().)

2. The second argument to register(): What is the meaning of "./" here? It usually means the current working directory of a process. Why not use import.meta.url - the URL of this very module?

   (In the ExperimentalWarning, cited by klippx in a comment above, pathToFileURL("./") is used because it is inline code used on the command line. There were no module file, and "./" had a meaning in that case.)

An example can be found here:
https://nodejs.org/dist/latest-v20.x/docs/api/module.html#enabling
Click "CJS <-> ESM" switch in the top-right corner to show it in ESM syntax.

[ihmpavel]

Hi @jlenon7 did you have time to look at the proposed changes? Looking forward to this PR to be merged. If I can help, i would love to

[nickmccurdy]

This looks good and it's nearly identical to the code Node recommends when using legacy --loader, though I'd recommend @thetutlage's suggestion. Is this enough to support --import ts-node/esm or would it have to be exposed?

[jlenon7]

Sorry the delay, I've uploaded the code with the suggestions.

[AaronNGray]

For further context and alternative example see :- #2100

[ElvenMonky]

So what's the resolution on this? Is it coming in?