Clarification in readme's "Making an object observable"

[Darcy Parker]

See https://github.com/benlesh/symbol-observable#making-an-object-observable

• The guidance is good, but it should probably handle the 2 forms of subscribe(), otherwise it won't satisfy the various ObservableLike type definitions in the wild. (2 forms here: https://github.com/tc39/proposal-observable#observable) The form with callback args rather than the object with callback args is popular in many ObservableLike implementations.

Also, I thought your recent blog https://benlesh.com/posts/learning-observable-by-building-observable/ was very helpful. It may be worth adding it as a reference.

[Ben Lesh]

The only form that was ever meant to be handled was basically this:

interface Unsubscribable {
   unsubscribe(): void;
}

interface Observer<T> {
   next(value: T): void;
   error(err: any): void;
   complete();
}

interface ObservableLike<T> {
   subscribe(): Unsubscribable;
   subscribe(observer: Partial<Observer<T>>): Unsubscribable;
}

interface ObservableInterop<T> {
   [Symbol.observable](): ObservableLike<T>;
}