Seonglae Chohtml element.scrollIntoView
element.scrollIntoView - Web API | MDN
Element (en-US) 인터페이스의 scrollIntoView() 메소드는 scrollIntoView()가 호출 된 요소가 사용자에게 표시되도록 요소의 상위 컨테이너를 스크롤합니다.
https://developer.mozilla.org/ko/docs/Web/API/Element/scrollIntoView
How To Add a Class Name
Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, PHP, Python, Bootstrap, Java and XML.
https://www.w3schools.com/howto/howto_js_add_class.asp
