javascript - 函数方法 .apply() .call() .bind()

Question

我需要帮助解决这个问题；

let person = {
  firstname: "Benjamin",
  dog: {
    named: "Louie",
    owner: function() {
      return this.named + " is " + this.firstname + "'s dog'";
    }
  }
}

console.log(person.dog.owner.call(person)); // prints undefined is Benjamin's dog' instead of Louie is Benjamin's dog'

我知道 call() 方法将引用没有 name 属性的 person 对象。

有没有办法使用bind()、call()或apply()方法来打印“Louie is Benjamin's dog'”

Answer 1

您的named key 位于dog下。所以称之为 this.dog.named

let person = {
  firstname: "Benjamin",
  dog: {
    named: "Louie",
    owner: function() {
      return this.dog.named + " is " + this.firstname + "'s dog'";
    }
  }
}

console.log(person.dog.owner.call(person));