JS基础练习|对象与原型链

function Animal(name) {
  this.name = name;
}

Animal.prototype.speak = function() {
  console.log(`${this.name} makes a noise.`);
};

function Dog(name) {
  Animal.call(this, name); // 继承属性
}

// 设置 Dog 的原型为 Animal 的实例
Dog.prototype = Object.create(Animal.prototype);
Dog.prototype.constructor = Dog; // 恢复构造函数指针

// 重写speak方法
Dog.prototype.speak = function() {
  console.log(`${this.name} barks.`);
};

const dog = new Dog("Rex");
dog.speak(); // 输出 "Rex barks."
console.log(dog.constructor === Dog); // 输出: false
console.log(dog.constructor === Animal); // 输出: true