JSR Converts `*.d.ts` Imports and Exports to `*.js` in NPM Projects

[DauntlessStudio]

With a package exported to JSR and imported to a Node project via npx jsr add <package> *.d.ts files have their imports/exports modified from import/export ...d.ts to import/export ...js.

Package Source

The following project structure will have the error.

types/
├── some_type.d.ts
└── index.d.ts
api/
└── mod.ts

some_type.d.ts

export type SomeType = string;

index.ts

export * from "./some_type.d.ts";

mod.ts

import * from "../types/index.d.ts";

Node Modules

When imported into node_modules the imported version of index.d.ts will have been converted from

export * from "./some_type.d.ts";

to

export * from "./some_type.js";

This only occurs in the *.d.ts files, mod.ts will correctly maintain its *.d.ts imports.

[lucacasonato]

This is intentional and the same thing that tsc does - is this not working for you for whatever reason?

[DauntlessStudio]

I did not realize this is intentional. Since my *.d.ts imports are converted to ending in *.js. But my *.d.ts files are not converted to *.js, and can't be converted since they just contain type data

This means my project, which works fine as a deno project, gets a bunch of errors when imported into a node project as the imports like

export * from "./some_type.js";

Is pointing to a non-existent file since the actual file is still some_type.d.ts.

Is there something I would need to set up differently so that these imports don't point to missing files after being imported into a node project?

[easrng]

Try export type *

[lucacasonato]

Oh I see the problem now.

[DauntlessStudio]

Try export type *

I adjusted my exports to export type * from "./some_type.d.ts, published, and installed via npm but they've still been automatically converted to export type * from "./some_type.js".