如何在TypeScript中重用子字段

Question

我的接口定义如下：

interface One {
  one: {
    oneone: string;
    fieldA: string;
    fieldB: string;
    fieldC: string;
  }
}

interface Two {
  two: {
    twotwo: string;
    fieldA: string;
    fieldB: string;
    fieldC: string;
  }
}

如您所见，fieldA，fieldB和fieldC是可共享的。无论如何，我们可以分享它们吗？像

interface SharedFields {
    fieldA: string;
    fieldB: string;
    fieldC: string;
}

interface One {
  one: (extends SharedFields) {
    oneone: string;
  }
}

Answer 1

您可以为此使用intersection type：

interface SharedFields {
    fieldA: string;
    fieldB: string;
    fieldC: string;
}

interface One {
  one: SharedFields & {
    oneone: string;
  }
}