如何从孙子节点访问父节点上的方法

// 父节点
class Parent {
  constructor() {
    this.name = "Parent";
  }

  getParentMethod() {
    return "This is a method in Parent";
  }
}

// 子节点
class Child {
  constructor(parent) {
    this.name = "Child";
    this.parent = parent;
  }

  getChildMethod() {
    return "This is a method in Child";
  }

  accessParentMethod() {
    return this.parent.getParentMethod();
  }
}

// 孙子节点
class GrandChild {
  constructor(child) {
    this.name = "GrandChild";
    this.child = child;
  }

  getGrandChildMethod() {
    return "This is a method in GrandChild";
  }

  accessParentMethod() {
    return this.child.accessParentMethod();
  }
}

// 创建实例对象
const parent = new Parent();
const child = new Child(parent);
const grandchild = new GrandChild(child);

// 从孙子节点访问父节点上的方法
console.log(grandchild.accessParentMethod()); // 输出：This is a method in Parent