Javascript类调用Super并在回调中使用它

class Parent {
  constructor(name) {
    this.name = name;
  }

  sayHello() {
    console.log(`Hello, ${this.name}!`);
  }
}

class Child extends Parent {
  constructor(name, age) {
    super(name); // 调用父类的构造函数
    this.age = age;
  }

  sayHello() {
    super.sayHello(); // 调用父类的同名方法
    console.log(`I'm ${this.age} years old.`);
  }
}

const child = new Child('Alice', 10);
child.sayHello();

Hello, Alice!
I'm 10 years old.