JSON使用getter / setter引用ES6类属性

问题描述

我有一个JavaScript ES6类，其属性设置为 set ，并使用 get 函数访问。它也是一个构造函数参数，所以类可以用所述属性实例化。

I have a JavaScript ES6 class that has a property set with set and accessed with get functions. It is also a constructor parameter so the class can be instantiated with said property.

class MyClass {
  constructor(property) {
    this.property = property
  }

  set property(prop) {
  // Some validation etc.
  this._property = prop
  }

  get property() {
    return this._property
  }
}

我使用 _property 来转义使用get / set的JS getcha，如果我直接设置则导致无限循环到属性。

I use _property to escape the JS gotcha of using get/set that results in an infinite loop if I set directly to property.

现在我需要对一个MyClass的实例进行字符串发送，并发送一个HTTP请求。字符串JSON是一个对象，如：

Now I need to stringify an instance of MyClass to send it with a HTTP request. The stringified JSON is an object like:

{
   //...
   _property:
}

我需要生成的JSON字符串以保留属性所以我发送的服务可以正确解析。我还需要属性保留在构造函数中，因为我需要从服务发送的JSON中构造MyClass的实例（它是使用属性 not _property ）。

I need the resulting JSON string to preserve property so the service I am sending it to can parse it correctly. I also need property to remain in the constructor because I need to construct instances of MyClass from JSON sent by the service (which is sending objects with property not _property).

我该如何解决？在发送到HTTP请求之前应该拦截MyClass实例，并使用正则表达式将 _property 变成属性这似乎是丑陋的，但我可以保留我现在的代码。

How do I get around this? Should I just intercept the MyClass instance before sending it to the HTTP request and mutate _property to property using regex? This seems ugly, but I will be able to keep my current code.

或者，我可以拦截从服务发送到客户端的JSON，并将MyClass完全实例化不同的属性名称。但是这意味着服务的任何一方不同的表示方式。

Alternatively I can intercept the JSON being sent to the client from the service and instantiate MyClass with a totally different property name. However this means a different representation of the class either side of the service.

推荐答案

您可以使用来自定义你的类序列化到JSON的方式：

You can use toJSON method to customise the way your class serialises to JSON:

class MyClass {
  constructor(property) {
    this.property = property
  }

  set property(prop) {
  // Some validation etc.
  this._property = prop
  }

  get property() {
    return this._property
  }

  toJSON() {
    return {
      property: this.property
    }
  }
}

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