"exports" in package.json in combination with type exports

[ehrencrona]

If a module uses exports in the package.json to restrict access to only certain packages public, but also defines types, then you will not be able to access those types when importing the module with Snowpack (unless there is also a main module).

I.e. a module might have the following in its package.json:

  "types": "index.d.ts",
  "exports": {
    "./foo": "./foo"
  }

in which case an import of a type defined in index.d.ts e.g. import { SomeType } from "module"; will not work with Snowpack.

It will work with tsc because it currently ignores exports entirely. You might nevertheless want to define exports to make packages private to importing projects that are not using TypeScript.

Repro: https://github.com/ehrencrona/snowpack-exports-with-types-repro
Go to depender and run npm run dev; you'll get Package "dependee" not found
Removing the type import in src/index.ts will make it work (once you've done this, it will work even if you put it back in unless you nuke the Snowpack cache).

Note that adding index.d.ts to the exports will not help; requiring this might be a fairly easy way of supporting this usecase.

[artemis-prime]

Why not file this as an issue?