Add alternate build that uses callbacks (instead of Promises) about fontfaceobserver

[bramstein]

Hmm, that is an interesting question 😄

How would it work, an alternate build that uses callback with the primary option being promises?

[localnerve]

My simple, initial idea (untested) is that in "callback" builds, Observer.prototype.check just returns the promise executor directly, allowing the caller to supply callbacks for resolve, reject.

[bramstein]

I like that idea. The only downside is that FontFaceObserver can call reject or resolve multiple times. Promises take care of that transparently, but callbacks wouldn't.

[bramstein]

I gave this some more thought, and I think it makes sense to remove the dependency on promises. I think the benefits of a smaller size that can be inlined in the HTML document outweigh the benefits of promises. I'll change the API to only use callbacks (for those people who like promises it is very easy to convert).

[localnerve]

👍

[coryrylan]

👍

[localnerve]

Is this planned for 2.x, per #19?

[bramstein]

Yes, it's on the schedule. Hope to get some work done on it next week (no promises though). Also, let me know if anyone else would like to take it on.

[bramstein]

Closing this and moving the discussion to #19.