MutationObserver
Description
The MutationObserver of MutationObserver for JS constructs a MutationObserver object and sets its callback to callback. The callback is invoked with a list of MutationRecord objects as first argument and the constructed MutationObserver object as second argument. It is invoked after nodes registered with the observe() method, are mutated.
Syntax
observer = new MutationObserver(callback)
Parameters
callback
The callback that will be invoked when the event is dispatched.
