Inability to import .ts files to workflow or step files in Nitro

[mikkokut]

When using the workflow package with Nitro, importing .ts helper files into workflow or step files is not supported. It throws error:

Error: Unknown file extension ".ts" for /code/nitro-workflow-sample/lib/helpers.ts

// workflows/test.ts

import say from "../lib/helpers";

async function createUser(email: string) {
    "use step";

    console.log(say());

    return { id: crypto.randomUUID(), email };
}

Reproduction:
A minimal example is available here: https://github.com/mikkokut/nitro-workflow-sample.

Update:
It works when deployed to Vercel, but not when running the development server locally.

[eersnington]

@mikkokut looks like the workflow swc plugin isn't including the ts file into the bundle (makes sense why then it would work when you build and deploy it).

try this >>

      "baseUrl": ".",
      "paths": {
        "@/*": ["./*"]
      },

into the tsconfig.json

and use absolute imports like this >>

import say from "@/lib/helpers";

[eersnington]

Sorry, I was on github mobile. But this should work

[eersnington]

Okay this works 👍

mikkokut/nitro-workflow-sample#2

[mikkokut]

Perfect, it works! Thanks a lot 🙌 I'll keep this open for now, as it may still need some tweaks for the workflow package or documentation.

[mikkokut]

Works with .beta28