将打字稿接口属性类型转换为联合[重复]

我有这个接口，我想从它包含的键类型生成一个新类型。

interface SomeType {
  abc: string;
  def: number;
  ghi: boolean;
}

输入生成：

type SomeOtherType = string | number | boolean

这在打字稿中可能吗？

您可以尝试使用 keyof 运算符进行索引：

interface SomeType {
  abc: string;
  def: number;
  ghi: "sdf";
}

type t = SomeType[keyof SomeType];

The type t will be assumed as a type union that comes from the values of the object:

https://www.typescriptlang.org/play?#code/JYOwLgpgTgZghgYwgAgMoHsC2EAqBPABxQG8AoZZOAIwQC5kBnMKUAcwG5zkATCGekAFdMVaJwqsAFsHoAiBtxizOAX1KkwhFGGQBeNFlxaA2gGsIedDAPZ8RALrsgA https://www.typescriptlang.org/play?#code/JYOwLgpgTgZghgYwgAgMoHsC2EAqBPABxQG8AoZZOAIwQC5kBnMKUAcwG5zkATCGekAFdMVaJwqsAFsHoAiBtxizOAX1KkwhFGGQBeNFlxaA2gGsIedDAPZ8RALrsgA