#React #javascript #commit phase #render phase #actual dom #렌더트리 #reactmemo #렌더링 과정 #성능최적화 #forntend #CSSOM #렌더링과정 #브라우저렌더링 #useCallback #useMemo #ReactHook #리렌더링 #리액트최적화 #virtual dom #리액트 #memoization #repaint #reflow #reconciliation #렌더링 #DOM #css #HTML