Javascript 从 iFrame 获取父文档
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Getting parents document from iFrame
提问by stiank81
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?)?
我已经看到了一些从 iframe 获取父文档的优雅解决方案 - 例如这个。但是，我无法让它工作 - 我认为这是不可能的，因为证券问题（跨域脚本？）？
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.documentor window.parent.documentfrom the content of the iframe?
我的问题是；我是否仍然可以从 iframe 内部访问父文档 - 或者近年来这是否发生了变化？如果我应该能够访问它；关于为什么我在打印时parent.document或window.parent.document从 iframe 的内容中未定义的任何想法？
回答by Rob W
It's still possible to access the parent from within a frame provided that the domains match.
如果域匹配 ，仍然可以从框架内访问父级。
For example, have a look at these fiddles:
例如，看看这些小提琴：
- Frame host:
fiddle.jshell.net, parent host:fiddle.netDoes 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/
- 帧主机：
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/
You can access the parent through:
您可以通过以下方式访问父级：
window.parent
parent
top //If the parent is the top-level document
window.top
The variables parentand topcan be overwritten (usually not intended). It's safer to use window.parentto be more safe. Alternatively, you can replace windowby document.defaultView.
变量parent和top可以被覆盖（通常不是故意的）。使用window.parent更安全更安全。或者，您可以替换window为document.defaultView。
