如何创建在远程页面中定义的类的对象? [英] How can I create an object of a class which is defined in the remote page?

问题描述

例如，在远程网页中，有如下代码片段:

For example, in the remote webpage, there is a snippet of code like this:

<script>
function foo(){
this.bar = 0;
}

在我的油脂猴子脚本中，我想创建一个此类的对象:

In my greasemonkey script, I want to create an object of this class:

var _foo= unsafeWindow['foo'];
new _foo();

然后我看到一个非法值错误.

Then I got an Illegal Value error.

推荐答案

方法如下:

var _foo = eval('(' + unsafeWindow.foo.toSource() + ')');
var x = new _foo();

尽管我不确定，由于Greasemonkey的安全区域或沙箱不同，可能需要此解决方法.

This workaround may be required due to the different security zones or sandboxing that Greasemonkey does, though I'm not entirely sure.

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