TypeError [ERR_UNKNOWN_FILE_EXTENSION]: Unknown file extension ".ts" in Node v21.5.0

[cibilex]

First of all ,I already looked at #1997 and most of other websites to solve the problem but I couldn't.This error is throwed when I try to use in Node v21.5.0.I realized that The problem is node version,when I updated Node version to v19.0.0 it works.Could you please update ts-node to work in new Node versions.

Best regards.

[AaronNGray]

Getting same issue, but I have a working version that I solved this issue on, and now a new project on which it does not. It is something else and I cannot remember what it is. Will report back once I have debugged the issue.

[AaronNGray]

Heres a working example with node v21.5.0, typescript v5.3.3, ts-node v10.9.2 :-
https://github.com/AaronNGray/ts-node-example

NOTE: I have just found this does not seem to support imports !!!

[AaronNGray]

First of all ,I already looked at #1997 and most of other websites to solve the problem but I couldn't.This error is throwed when I try to use in Node v21.5.0.I realized that The problem is node version,when I updated Node version to v19.0.0 it works.Could you please update ts-node to work in new Node versions.

Could you please provide a minimal example of what does not work and then we can try to figure out why !

[peschee]

Heres a working example with node v21.5.0, typescript v5.3.3, ts-node v10.9.2 :- https://github.com/AaronNGray/ts-node-example

This is not an ESM package. Try setting type to module in your package.json.

[AaronNGray]

Heres a working example with node v21.5.0, typescript v5.3.3, ts-node v10.9.2 :- https://github.com/AaronNGray/ts-node-example

This is not an ESM package. Try setting type to module in your package.json.

AFAICS I am not sure ts-node supports ESM. Could you provide the example that works on node v19.0.0, but not v21.5.0. Or is it as simple as setting "type":"module" ? As in :-
https://github.com/AaronNGray/ts-node-example/tree/ts-node-esm-module

on v21.5.0 resulting in :-

C:\Users\Nathaniel\test\Node.js\ts-node-example>npm start

> ts-node-example@0.0.1 start
> ts-node src/index.ts

TypeError: Unknown file extension ".ts" for C:\Users\Nathaniel\test\Node.js\ts-node-example\src\index.ts
    at Object.getFileProtocolModuleFormat [as file:] (node:internal/modules/esm/get_format:160:9)
    at defaultGetFormat (node:internal/modules/esm/get_format:203:36)
    at defaultLoad (node:internal/modules/esm/load:143:22)
    at async ModuleLoader.load (node:internal/modules/esm/loader:409:7)
    at async ModuleLoader.moduleProvider (node:internal/modules/esm/loader:291:45)
    at async link (node:internal/modules/esm/module_job:76:21) {
  code: 'ERR_UNKNOWN_FILE_EXTENSION'
}

[AaronNGray]

Adding :-

"start:node": "node --loader ts-node/esm src/index.ts"

and tsconfig.json :-

"module": "esnext"

We have :-

https://github.com/AaronNGray/ts-node-example/tree/ts-node-esm-loader

which gives :-

C:\Users\Nathaniel\test\Node.js\ts-node-example>npm run start:node

> ts-node-example@0.0.1 start:node
> node --loader ts-node/esm src/index.ts

(node:18508) 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("./"));'
(Use `node --trace-warnings ...` to show where the warning was created)
ts-node

NOTE: I have just found this does not seem to support imports !!!

[cibilex]

First of all ,I already looked at #1997 and most of other websites to solve the problem but I couldn't.This error is throwed when I try to use in Node v21.5.0.I realized that The problem is node version,when I updated Node version to v19.0.0 it works.Could you please update ts-node to work in new Node versions.

Could you please provide a minimal example of what does not work and then we can try to figure out why !

I've modified the project a bit and created new repository.link: https://github.com/cibilex/ts-node-err

This project doesn't work in node v21.5.0 while works In node v16.20.2 for me.

[AaronNGray]

First of all ,I already looked at #1997 and most of other websites to solve the problem but I couldn't.This error is throwed when I try to use in Node v21.5.0.I realized that The problem is node version,when I updated Node version to v19.0.0 it works.Could you please update ts-node to work in new Node versions.

Could you please provide a minimal example of what does not work and then we can try to figure out why !

I've modified the project a bit and created new repository.link: https://github.com/cibilex/ts-node-err

This project doesn't work in node v21.5.0 while works In node v16.20.2 for me.

You modified start to : -"start": "ts-node-esm src/index.ts"

The version I posted last works AFAICT without proper testing, but I did do an import

Note: --loader maybe deprecated.

https://github.com/AaronNGray/ts-node-example/tree/ts-node-esm-loader

NOTE: I have just found this does not seem to support imports !!!

[AaronNGray]

@cibilex - Theres a pull request waiting :- #2073

[cibilex]

@cibilex - Theres a pull request waiting :- #2073

Thank you a lot,It works now splendid :)

[AaronNGray]

@cibilex - Did you manage to add the two commits to a ts-node fork or did you just patch the diff's ?
If you used git I would love to know how ! On the other front I seem to remember GitHub giving diffs but it does not seem to have downloads for them anymore. Or did you just use a reference to the repo in package.json dependencies ?

[cj-christoph-gysin]

@cibilex - Did you manage to add the two commits to a ts-node fork or did you just patch the diff's ? If you used git I would love to know how !

$ git fetch https://github.com/TypeStrong/ts-node refs/pull/2073/head
$ git checkout -b pr-2073 FETCH_HEAD

On the other front I seem to remember GitHub giving diffs but it does not seem to have downloads for them anymore.

You can just add .diff or .patch to any github url for a commit or PR, e.g.: https://github.com/TypeStrong/ts-node/pull/2073.diff