Definition
DOM Standard defines MutationRecord
[Exposed=Window]
interface MutationRecord {
readonly attribute DOMString type;
[SameObject] readonly attribute Node target;
[SameObject] readonly attribute NodeList addedNodes;
[SameObject] readonly attribute NodeList removedNodes;
readonly attribute Node? previousSibling;
readonly attribute Node? nextSibling;
readonly attribute DOMString? attributeName;
readonly attribute DOMString? attributeNamespace;
readonly attribute DOMString? oldValue;
};