我可以在javascript中动态添加属性吗? [英] Can I add a property dynamically in javascript?
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问题描述
在运行时向对象添加属性是否可以?它似乎运行正常,但我有什么问题需要注意吗?
Is it okay to add properties to an object at runtime? It seems to run okay but are there any issues I should be aware of?
我正在使用第三方javascript API,它有一个对象类,我是实例化并在实例化后添加我自己的属性,如下面的代码:
I'm using a 3rd party javascript API which has an object class, which I've instantiated and added my own property to after instantiation, like the code below:
例如我可以这样做:
var Car = function (id, type) {
this.id = id;
this.type = type;
};
var myCar = new Car(1,"Nissan");
// CAN I DO THIS: (needsWork not a property of object Car)
myCar.needsWork = true;
推荐答案
是的,这称为对象扩充。它是JavaScript中的一个关键功能。
Yea, this is called object augmentation. It is a key feature in JavaScript.
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