MutationObserverThe MutationObserver API watches for changes to the DOM tree and calls a callback function when DOM changes occur.domDOMwidely2015-07-292018-01-29https://dom.spec.whatwg.org/#interface-mutationobserverhttps://developer.mozilla.org/docs/Web/API/MutationRecordapi.MutationObserverapi.MutationObserver.MutationObserverapi.MutationObserver.disconnectapi.MutationObserver.observeapi.MutationObserver.takeRecordsapi.MutationRecordapi.MutationRecord.addedNodesapi.MutationRecord.attributeNameapi.MutationRecord.attributeNamespaceapi.MutationRecord.nextSiblingapi.MutationRecord.oldValueapi.MutationRecord.previousSiblingapi.MutationRecord.removedNodesapi.MutationRecord.targetapi.MutationRecord.typehttps://nowyoucanuse.com/features--mutationobserver.html