What does this mean: public sub(params: { new(...args: any[]): T }): Observable

Question

Below is Typescript code. I don't understand what is a type of params parameter?

export class SomeService {
    ...
    public subscribe<T>(params: { new(...args: any[]): T }): Observable<T> {

        ...
    }
    ...
}

Can someone explain to me what this part means { new(...args: any[]): T }?

UPDATE:

params has to be Type. Here is an example

Like this: someService.subscribe(String); or someService.subscribe(SomeClass);

@rlemon, thanks. The link is not that clear for a newbie like me. But link inside the link is very clear: https://stackoverflow.com/questions/38311672/generic-and-typeof-t-in-the-parameters/38311757#38311757 — AntonIva, Oct 30 '18 at 17:20
Every line of typescript code I see makes me hate it more. I consider that completely unreadable. — connexo, Nov 06 '18 at 20:34

score 0 · Answer 1 · answered Oct 30 '18 at 17:00

0

I think that is telling you that params must be constructible by any number of parameters, which becomes a T.

answered Oct 30 '18 at 17:00

Daniel A. White

1 Answers1