완료 todo - end 날짜 어제 날짜보다 작으면 완료로 구분

const today = new Date(); const deadline = new Date(today.setDate(today.getDate() - 1)); const doneTodos = todos?.filter((todo) => new Date(todo.end) < deadline); const doneTodosNum = doneTodos?.length; <h1>{doneTodosNum}</h1> <p>개의 Todo가 완료되었어요!</p>