Type definitions overshadowing

TypeScript Version: 3.8.3

(also tried 3.9.0-dev.20200310)

Search Terms: “Module ‘“immutable”’ has no exported member”

Code

(not self contained)

import { hash } from "immutable";

export function test(): number {
    return hash(1);
}

Actual behavior:

src/index.ts:1:10 - error TS2305: Module '"immutable"' has no exported member 'hash'.

1 import { hash } from "immutable";
           ~~~~

even though grep "export function hash" node_modules/immutable/dist/immutable.d.ts reveals export function hash(value: any): number;

Because it uses type definitions in node_modules/@types/draft-js/node_modules/immutable/dist/immutable.d.ts instead of node_modules/immutable/dist/immutable.d.ts

Demo:

sadly I did not find any way to put it in a playground, in any case: https://gitlab.com/rawieo/issue_demo_1

Related Issues:

• https://github.com/facebook/create-react-app/issues/8578
• https://github.com/immutable-js/immutable-js/issues/1502 (probably)

[RyanCavanaugh]

@sheetalkamat I think we need something that would allow this to not happen, even if it’s not feasible to make it work out-of-the-box. Any ideas?

[Rawieo]

@FilipMessa no, sadly I had no luck searching for solution in user-space. I was considering fixing the compiler myself, but I have no idea how so I didn’t even try.