What does this entry mean in TypeScript?

Question

typescript

public subscribe(channel: string, handler: (value: any) => void) {
    return this.data.subscribe(handler);
}

Does this mean that the second argument is a function with a value parameter?

And that it is returned as a result from the function?

What will the subscribe function return?

Answer 1

Does this mean that the second argument is a function with a value parameter?

Yes

And that it is returned as a result from the function?

No

What will the subscribe function return?

Will return the same value as returned by the "this.data.subscribe" function. The return type will also be the same