As of September 10, 2024, this name is no longer defined by a Web Platform specification
Definition
UI Events defines MutationEvent
[Exposed=Window]
interface MutationEvent : Event {
// attrChangeType
const unsigned short MODIFICATION = 1;
const unsigned short ADDITION = 2;
const unsigned short REMOVAL = 3;
readonly attribute DOMString prevValue;
readonly attribute DOMString newValue;
readonly attribute DOMString attrName;
readonly attribute unsigned short attrChange;
undefined initMutationEvent(DOMString typeArg,
optional boolean bubblesArg = false,
optional boolean cancelableArg = false,
optional Node? relatedNodeArg = null,
optional DOMString prevValueArg = "",
optional DOMString newValueArg = "",
optional DOMString attrNameArg = "",
optional unsigned short attrChangeArg = 0);
};