为什么有时候在TS中查看不了具体的类型？

Question

interface Props {
  className?: string;
  visible?: boolean;
  show?: boolean;
  content?: string;
  text?: string;
}

type Res = Omit<Props, 'visible'> | Omit<Props, 'show'>

想要得到结果:

{
  className?: string;
  show?: boolean;
  content?: string;
  text?: string;
} | {
  className?: string;
  visible?: boolean;
  content?: string;
  text?: string;
}

Answer 1

好像目前没有啥选项能控制显示出计算后的类型，不过可以通过多加个类型来展开：

type Expand<T> = T extends infer O ? { [K in keyof O]: O[K] } : never;
type Res = Expand<Omit<Props, 'visible'> | Omit<Props, 'show'>>

• https://github.com/microsoft/vscode/issues/94679#issuecomment-755194161