Tim'sBlog

TS的笔记

 88  1 分钟

keyof

返回值为联合类型（或者的关系）

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interface IArticle {
  content: string;
  authorId: number;
  category: string;
}

// 'content' | 'authorId' | 'category'
type ArticleKeys = keyof IArticle;

结合 typeof 操作符获取对象的 keys

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const article = {
  content: 'content',
  authorId: 123,
  category: 'misc',
};

// 'content' | 'authorId' | 'category'
type ArticleKeys = keyof typeof article;