Typescript Private or protected member 'something' 无法在类型参数上访问

Question

class SomeClass<T extends string> {
  protected someMethod(): void {

  }

  protected someOtherMethod(): ReturnType<this["someMethod"]> { 
  // Private or protected member 'someMethod' cannot be accessed on a type parameter.ts(4105)


  }
}

有没有办法在类本身中引用 protected 类成员的类型？

Answer 1

这可以通过使用类名而不是 this 轻松解决。 :

class SomeClass {
  protected someMethod(): void {

  }

  protected someOtherMethod(): ReturnType<SomeClass["someMethod"]> { 

  }
}

Playground Link