javascript - 从prototype.object获取类上下文

Question

这是一个例子。我想在animal.skills.kick() 中获取 Animal 上下文。我如何实现这个？

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

Animal.prototype.run = function() {
  console.log('..running')
}

Animal.prototype.skills = {
  kick: function() {
    console.log(this)
  }
}

var animal = new Animal('rabbit');

animal.skills.kick()

Answer 1

您想要做的事情对我来说听起来是一个非常糟糕的设计，但一种方法是在构造函数中移动技能声明:

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

    var that = this;
    this.skills = {
        kick: function() {
            console.log(that);
        }
    };
}

Animal.prototype.run = function() {
    console.log('..running');
}

var animal = new Animal('rabbit');

animal.skills.kick();