jQuery 从 dom 元素获取 window 对象的引用
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Get reference of window object from a dom element
提问by Aniket
I have a javascript code like this
我有一个这样的 javascript 代码
var element = $("elementId");
I got the reference to the element (which is a div).
我得到了对元素的引用（这是一个 div）。
Now I need to get the reference to the window in which this div element resides. But the problem is, here the $ is passed from a different window. So now the element resides in a different window.
现在我需要获取对这个 div 元素所在的窗口的引用。但问题是，这里的 $ 是从不同的窗口传递的。所以现在元素驻留在不同的窗口中。
How to get reference to that window object which contains this div element? Pls Help.
如何获取对包含此 div 元素的窗口对象的引用？请帮助。
回答by Rob W
Get a reference to the DOM node, use the ownerDocumentproperty to get a reference to the document, then read its defaultViewproperty (parentWindowfor IE8-) to get a reference to the window:
获取DOM节点的引用，使用ownerDocument属性获取文档的引用，然后读取其defaultView属性（parentWindow对于IE8-）获取窗口的引用：
var $element = $('#elementId');
var element = $element[0];
// Assume that element exists, otherwise an error will be thrown at the next line
var doc = element.ownerDocument;
var win = doc.defaultView || doc.parentWindow;
