在iFrame中的DART网站/组件中，如何查询父窗口的元素？ [英] In a DART website/component that is in an iFrame, how can I query elements of the parent window?

问题描述

collegues，

collegues,

我正在解决我之前的 ISSUE 我遇到了一些涉及影子DOM和重度JS动画的性能问题。

I'm solving my previous ISSUE where I had some performance issues involving the shadow DOM and heavy JS animations that were not done in DART.

建议的解决方案是将我的DART组件移动到iFrame，将shadowDOM限制为只有iFrame的DOM。

The proposed solution for this was to move my DART component into an iFrame, to restrict the shadowDOM to the DOM of only that iFrame.

现在的问题：

如何从我的DART代码元素中查询JS：window.parent？任何想法如何可以注册监听器onclick的父iFrame上的元素？ （我也使用Polymer）

How can I query from my DART code elements from JS:window.parent? Any ideas on how can I register listeners to onCLick of elements on the parent iFrame? (I'm using Polymer as well)

感谢在前进

推荐答案

p> Dart通常不会将DOM暴露在iframe边界之外。你可以通过postMessage进行通信。我建议在iframe里面听点击，然后从该处理程序中向window.parent发布一条消息。

Dart generally doesn't expose the DOM across iframe boundaries. You can communicate via postMessage though. I would suggest listening for "click" inside the iframe, then from within that handler, post a message to the window.parent.

这篇文章中的例子在其他方向（Dart托管一个JS子项iframe），但它可能是有帮助的：
http://japhr.blogspot.com/2013/05/a-necessary-evilgood-in-dart-iframe.html

The example in this post goes in the other direction (Dart hosting a JS child iframe), but it might be helpful: http://japhr.blogspot.com/2013/05/a-necessary-evilgood-in-dart-iframe.html

这篇关于在iFrame中的DART网站/组件中，如何查询父窗口的元素？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！