Not all flavors of anonymous observers work properly.

[benlesh]

I noticed that in some scenarios, if you pass an incomplete anonymous observer, which should totally work, it throw errors... for example:

Observable.of(1).subscribe({ next(x) { console.log(x); } });

Also, I've noticed that the Observer interface doesn't allow for optional handlers, so we need to adjust for that.

[trxcllnt]

@Blesh I thought we used to have the same logic in the Subscriber constructor as we do in the static create method?

[benlesh]

It's just silly bugs around not checking to see if destination actually has a complete before calling it, for example.