javascript - 对象 # 没有方法 'carName'

Question

所以我收到了这个错误；对象 # 没有方法 'carName'但我清楚地知道。 Pastebin

我也试过引用汽车的“模型”属性

player.car.model

但这不起作用，我收到类型错误。有任何想法吗？您需要更多信息吗？

function person(name, car) {
    this.name = name;
    this.car = car;
    function carName() {
        return car.model;
    }
}

var player = new person("Name", mustang);
var bot = new person("Bot", mustang);
var bot2 = new person("Bot 2", mustang);

function makeCar(company, model, maxMPH, tireSize, zeroToSixty) {
    this.company = company;
    this.model = model;
    this.maxMPH = maxMPH;
    this.tireSize = tireSize;
    this.zeroToSixty = zeroToSixty;
}

var mustang = new makeCar("Ford", "Mustang GT", 105, 22, 8);
var nissan = new makeCar("Nissan", "Nissan 360z", 100, 19, 6);
var toyota = new makeCar("Toyota", "Toyota brandname", 95, 21, 7);

Answer 1

它没有方法。它有一个局部于构造函数变量范围的函数。

要为每个对象赋予功能，将其分配为属性...

function person(name, car) {
    this.name = name;
    this.car = car;
    this.carName = function() {
        return this.car.model;
    };
}

或者更好的是，将它放在构造函数的原型(prototype)上...

function person(name, car) {
    this.name = name;
    this.car = car;
}

person.prototype.carName = function() {
    return this.car.model;
};

此外，当您将 mustang 传递给 person 构造函数时，它不会被初始化。