从iFrame获取父母文档 [英] Getting parents document from iFrame

问题描述

我已经看到了一些有关从iframe获取父母文档的优雅解决方案 - 例如这一个。但是，我无法让它工作 - 我认为这不可能是由于证券问题（跨域脚本？）？

我的问题是;我仍然可以从iframe中访问父母文档吗？或者最近这些年改变了吗？如果我能够访问这个;从iframe的内容中打印 parent.document 或 window.parent.document 时为什么会出现未定义的任何想法？ 如果域匹配，仍然可以从框架内访问父级。 / p>

例如，看看这些小提琴：

• 框架主机： fiddle.jshell.net ，父主机： fiddle.net 不匹配=失败 <测试＃1： http://jsfiddle.net/nrRQg/1/
>

• 框架主机： jsfiddle.net ，父主机： jsfiddle.net **匹配=成功*
  
  测试＃2： http://jsfiddle.net/nrRQg / 1 / show /

您可以通过以下方式访问父级：
$ b $如果父级是顶级文档
window.top

变量父母和 top ca n被覆盖（通常不打算）。使用 window.parent 更安全。或者，您可以用 document.defaultView 替换 window 。

I have seen some elegant solutions on fetching the parents document from iframe - like e.g. this one. However, I can't make it work - and I didn't think this was possible due to securities issues (cross domain scripting?)?

My question is; can I still access the parents document from inside an iframe - or has this changed the recent years? If I should be able to access this; any thoughts on why I get undefined when printing parent.document or window.parent.document from the content of the iframe?

解决方案

It's still possible to access the parent from within a frame provided that the domains match.

For example, have a look at these fiddles:

• Frame host: fiddle.jshell.net, parent host: fiddle.net Does not match = failure
  Test #1: http://jsfiddle.net/nrRQg/1/
• Frame host: jsfiddle.net, parent host: jsfiddle.net **Matches = success*
  Test #2: http://jsfiddle.net/nrRQg/1/show/

You can access the parent through:

window.parent
parent
top          //If the parent is the top-level document
window.top

The variables parent and top can be overwritten (usually not intended). It's safer to use window.parent to be more safe. Alternatively, you can replace window by document.defaultView.

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