覆盖原生函数？ [英] Overriding native function?

问题描述

本地 document.createElement（）是愚蠢的（它只需要一个标签名称，没有属性）。我怎么不能覆盖它？这怎么不行？

The native document.createElement() is silly-stupid (it takes only a tag name and no attributes). How come I can't override it? How come this doesn't work?

var originalFunction = document.createElement;

document.createElement = function(tag, attributes) {
    var element = originalFunction(tag);

    if (attributes) {
        for (var attribute in attributes) {
            element.setAttribute(attribute, attributes[attribute]);
        }
    }

    return element;
};

问题是当您尝试替换本机功能时，浏览器会炸毁。由于文档不是JavaScript原语，所以您也不能为其创建原型。 WTF。

The problem is that browsers blow up when you try to replace a native function. Since document is not a JavaScript primitive, you can't create a prototype for it either. WTF.

推荐答案

据我所知，问题是调用code> document.createElement （）函数，即使引用必须来自文档。所以修改你的代码：

As far as I can tell the problem is that a call to the document.createElement() function even when referenced has to be from the document. So modify your code:

var element = originalFunction.call(document, tag);

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