toolkitchen/polyfills — pull request #33 by arv (2012-10-11 20:43:44+00:00)
Title: MutationObserver: Implement childList

I ended up changing how MutationRecords are created so that they do not share the [[Prototype]] like before. Instead I keep track of the current (1 or 2) records for the current mutation event so that we can determine if we need to replace the last item or not.