갑자기, DOMSubtreeModified 이녀석으로 인해 당혹스러운 문제가 생겨서..[Deprecation] Listener added for a 'DOMSubtreeModified' mutation event. This event type is deprecated, and will be removed from this browser VERY soon. Usage of this event listener will cause performance issues today, and represents a large risk of imminent site breakage. Consider using MutationObserver instead. See for more information.크롬에서 열심히 보..