Incorrect Typescript definition

[srosset81]

If I import the library as intended (import waitForExpect from 'wait-for-expect') in a TypeScript file, I get this error:

This expression is not callable.
  Type 'typeof import("./node_modules/wait-for-expect/lib/index")' has no call signatures.ts(2349)

Any idea on how to solve this ?

[lgandecki]

Sorry for this. Would you be able to create a simple repro?
I just created a simple one and it seems to be working fine

https://github.com/lgandecki/wait-for-expect-test

[andre-brdoch]

Hey @lgandecki,

I am seeing the same issue. Here is an example repo:
https://github.com/andre-brdoch/wait-for-expect-ts-not-callable-demo

Note that this only happens when i add "type": "module" to package.json. So this is probably a module resolution mismatch between ESM and CommonJS.

[andre-brdoch]

A temporary workaround is adding this type shim:

// wait-for-expect.d.ts
declare module 'wait-for-expect' {
  const waitForExpect: {
    (expectation: () => void | Promise<void>, timeout?: number, interval?: number): Promise<void>
    defaults: { timeout: number; interval: number }
  }
  export default waitForExpect
}

[lgandecki]

Thanks for the repro, but I'm not sure what to do with it.

gh repo clone andre-brdoch/wait-for-expect-ts-not-callable-demo
Cloning into 'wait-for-expect-ts-not-callable-demo'...
remote: Enumerating objects: 8, done.
remote: Counting objects: 100% (8/8), done.
remote: Compressing objects: 100% (6/6), done.
Receiving objects: 100% (8/8), 10.83 KiB | 10.83 MiB/s, done.
remote: Total 8 (delta 0), reused 8 (delta 0), pack-reused 0 (from 0)

cd wait-for-expect-ts-not-callable-demo/

npm install

added 42 packages, and audited 43 packages in 920ms

14 packages are looking for funding
  run `npm fund` for details

found 0 vulnerabilities

npm test

> wait-for-expect-ts-not-callable-demo@1.0.0 test
> vitest run


 RUN  v4.0.16 /Users/lukaszgandecki/projects/wait-for-expect-ts-not-callable-demo

 ✓ src/unit.test.ts (1 test) 1031ms
   ✓ test (1)
     ✓ works  1029ms

 Test Files  1 passed (1)
      Tests  1 passed (1)
   Start at  21:52:14
   Duration  1.12s (transform 17ms, setup 0ms, import 22ms, tests 1.03s, environment 0ms)

Are you sure that repo in the exact shape/version you pushed, on a clean clone is failing?

whats your npm version? Do you have typescript installed globally? the repo has tsconfig.json but no typescript in the package.json

[andre-brdoch]

Hey @lgandecki , my bad, you are right, I was relying on IDE type hints here!

I now added Typescript to the project. If you pull the newest changes and run npm run ts, you should get the error:

src/unit.test.ts:11:11 - error TS2349: This expression is not callable.
  Type 'typeof import("C:/path/to/wait-for-expect-ts-not-callable-demo/node_modules/wait-for-expect/lib/index")' has no call signatures.

11     await waitForExpect(() => {

Node 22.20.0
Npm 10.9.3