Typescript error when using CommonJS module outputs

[esuh-descript]

I am running across this bug when trying to import this package into a Typescript project configured to emit CommonJS modules:

$ pnpm run typecheck
> temporal-polyfill-bug@1.0.0 typecheck /src/temporal-polyfill-bug
> tsc --build tsconfig.json

index.ts:1:26 - error TS1479: The current file is a CommonJS module whose imports will produce 'require' calls; however, the referenced file is an ECMAScript module and cannot be imported with 'require'. Consider writing a dynamic 'import("temporal-polyfill")' call instead.
  To convert this file to an ECMAScript module, change its file extension to '.mts', or add the field `"type": "module"` to '/src/temporal-polyfill-bug/package.json'.

1 import { Temporal } from 'temporal-polyfill';
                           ~~~~~~~~~~~~~~~~~~~


Found 1 error.

 ELIFECYCLE  Command failed with exit code 1.

I've reproduced the above bug using a minimal example by cloning, running pnpm i, and then pnpm run typecheck.

I believe a fix is relatively straightforward based on microsoft/TypeScript#53045.

[arshaw]

Thanks @esuh-descript , I'll make a .cts file for the next version.

[arshaw]

This has been fixed in v0.2.4

@esuh-descript, I embedded your test case into the codebase's CI to ensure things don't break in the future. Thanks for that!