实现 Optional

Code

interface Article {
  title: string;
  content: string;
  author: string;
  date: Date;
  readCount: number;
}

type CreateArticleOptions = Optional<Article, 'date' | 'readCount'>;

实现

type Optional<T, K extends keyof T> = Omit<T, K> & Partial<Pick<T, K>>;