javascript - NodeJS：从父级访问子级的静态方法

Question

我正在使用 ES6：

class Parent {
  static sayHello(){
    ChildN.sayHi()
  }
}

class ChildOne extends Parent {
  static sayHi(){
    console.log('hi from ChildOne')
  }
}

class ChildTwo extends Parent {
  static sayHi(){
    console.log('hi from ChildTwo')
  }
}

ChildOne.sayHello()
ChildTwo.sayHello()

我想要N个孩子。是否可以在父类中动态获取子类并调用其静态方法？换句话说，如何在父类中概括 ChildN？

标签： javascriptnode.jsstatic

Answer 1

通过访问this父类的静态方法，您将引用子类，所以只需this.sayHi()：

class Parent {
  static sayHello(){
    this.sayHi()
  }
}

class ChildOne extends Parent {
  static sayHi(){
    console.log('hi from ChildOne')
  }
}

class ChildTwo extends Parent {
  static sayHi(){
    console.log('hi from ChildTwo')
  }
}

ChildOne.sayHello()
ChildTwo.sayHello()