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)

Comienza con src/index.ts y compara las declaraciones de node_modules/immutable/dist/immutable.d.ts y node_modules/@types/draft-js/node_modules/immutable/dist/immutable.d.ts. Reproduce la importación con TypeScript 3.8.3 o con la versión nightly indicada y, después, sigue la resolución de módulos para entender por qué se seleccionan las definiciones anidadas. Se considera terminado cuando el export de hash válido se resuelve sin TS2305.