适用于所有浏览器的Object.defineProperty吗? [英] Object.defineProperty for all browsers?

问题描述

询问Object.defineProperty，如下所示:

Asking about Object.defineProperty as demonstrated below:

function testComponent(){
    var testProperty;
    Object.defineProperty(this, "testProperty",
    {
        get : function()
        {
           return testProperty;
        },
        set : function(val)
        {
          testProperty = val;
        }
    });
}

将在何处使用:

testObject = new testComponent();
testObject.testProperty = "testValue";

根据我到目前为止所看到的，似乎没有跨浏览器解决方案，因为我尝试使用 这篇文章 ，而我的测试在IE 7和amp;中仍然失败. 8，谁能对此有所了解?

Based on what I've seen so far, it looks like there is no cross browser solution, as I've tried using es5-shim with no luck, but I would like to confirm. I also found a reference to this post and my tests still fail in IE 7 & 8, can anyone shed any light on this?

我记得几个月前在S/O的某个地方浏览过一个相关的问题，我想我看到有人在答案中为此写了一个解决方案. getter/setter的任何常规解决方法也将不胜感激.我的想法是，我需要在不将参数更改通过方法传递的情况下，在对象上使用某种等效的getter setter方法.我不需要IE6，但我想支持IE7 + ff 3.6+等范围内的浏览器

I remember looking through a related question a few months ago somewhere on S/O and I think I saw someone had written a solution for this in an answer. Any general workarounds for getter / setters would also be appreciated. The idea is that I need some equivalent of a getter setter on an object without passing the parameter change through a method. I don't need IE6, but I would like to support browsers in the range of IE7+ ff 3.6+ , etc

(这些密码会在我的计算机上的所有浏览器中传递，除了IE 7和8

(these pass in all browsers on my machine except IE 7 & 8

直接使用defineProperty，没有填充:
http://jsfiddle.net/uSYFE/

使用ES5填充程序进行小提琴演奏，我假设我需要做的就是包括它?:
http://jsfiddle.net/hyperthalamus/ntwDy/

使用IE推荐的解决方案:
http://jsfiddle.net/hyperthalamus/xfvz3/

推荐答案

根据 ES5-shim :

/！\ Object.defineProperty

/!\ Object.defineProperty

该方法将无声地设置为可写"，可枚举"和可配置".属性.

This method will silently fail to set "writable", "enumerable", and "configurable" properties.

为"getter"或"setter"提供"get"或设置"在描述符上使用"defineGetter"的引擎将在无提示的情况下静默失败.和"defineSetter"，包括到目前为止的IE 8的所有版本.

Providing a getter or setter with "get" or "set" on a descriptor will silently fail on engines that lack "defineGetter" and "defineSetter", which include all versions of IE up to version 8 so far.

IE 8提供了此方法的版本，但仅适用于DOM对象.因此，垫片将不会被安装并且尝试设置值".属性将在非DOM对象上静默失败.

IE 8 provides a version of this method but it only works on DOM objects. Thus, the shim will not get installed and attempts to set "value" properties will fail silently on non-DOM objects.

https://github.com/kriskowal/es5-shim/issues#第/5期

所以您知道您的答案.可以在DOM元素上完成(仅在IE8上).

So you know your answer. It can be done on DOM elements, that's it (and on IE8 only).

如果您希望IE7正常工作，我建议您只使用get/set方法.

I'd suggest you just use get/set methods if you want IE7 to work.

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