This extension called Hype MutationObserver, is a wrapper to MutationObserver. It allows to observer elements and act upon changes on their attributes, childlist and subtree. This Hype specific wrapper takes care to register and unregister the observer. It also helps in keeping the callback mutation events scene specific and offers an update rate feature.
Example Hype File:
1.0 Initial release under MIT
1.1 Added support for Updaterate