[Question] Possible to import ts modules from node_modules?

Hi,

We are, at my company, publishing a lot of private typescript npm modules. It is really handy to not compile the typescript files before publishing the module and letting the consumer transpile the code after its need. With tools like webpack, rollup, vite, esbuild this is really easy and has a lot of benefits.

However, when we now want to use a typescript file that is placed in node_modules in a Playwright test we got an error, probably because Playwright does not compile the code inside node_modules. Is this possible to configure?

Example:

// node_modules/my-package/index.ts
export const myNumber: number = 5;

// tests/example.spec.ts
import { test } from "@playwright/test";
import { myNumber } from "my-package";

test("My test", () => {
  console.log(myNumber);
});

Gives the following error when running npx playwright test:

node_modules/my-package/index.ts:1

export const myNumber: number = 5;
^^^^^^

SyntaxError: Unexpected token 'export'

    at Object.compileFunction (node:vm:352:18)
    at wrapSafe (node:internal/modules/cjs/loader:1031:15)

So is this possible to configure or do we have to pre-compile our module?

Thanks

[oskarkivra]

@lesha1201 I agree; there is plenty of use cases, and node_modules do not only contain javascript code these days.

I can reopen this and let @pavelfeldman and the rest of the team decide if this should have more attention or not.

[RickMeijer]

Thank you! We are working in a monorepo, and have some shared (private) packages that are typescript only, for convenience sake (to add another use case).