有没有办法阻止替换JavaScript对象属性？ [英] Is there any way to prevent replacement of JavaScript object properties?

问题描述

我想使对象的结构不可变，防止其属性随后被替换。但是，属性需要是可读的。这可能吗？

I would like to make an object's structure immutable, preventing its properties from being subsequently replaced. The properties need to be readable, however. Is this possible?

我确信没有语言功能（在Java中没有 final ） C＃中的 readonly 支持这一点，但想知道是否有其他机制可以实现相同的结果？

I'm sure there are no language features (along the lines of final in Java and readonly in C#) to support this but wondered whether there might be another mechanism for achieving the same result?

I我正在寻找这些方面的东西：

I'm looking for something along these lines:

var o = {
    a: "a",
    f: function () {
        return "b";
    }
};

var p = o.a;        // OK
o.a = "b";          // Error
var q = o.f();      // OK
o.f = function () { // Error
    return "c"; 
};

推荐答案

ECMAScript 5将有印章（）和 freeze（），但是使用当前的JavaScript实现没有好办法。

ECMAScript 5 will have seal() and freeze(), but there's no good way to do this with current JavaScript implementations.

来源。

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