问题
I have the markup below:
<html>
<body>
<div class="aaa"></div>
<div class="aaa"></div>
<div class="aaa">
<iframe>
<form id="myform">
</form>
</iframe>
</div>
<div class="aaa"></div>
</body>
</html>
On loading the iframe, it contains the form '#myform'.
Upon submission of the form, I need to run a certain callback based on the div.aaa that is the immediate parent of the iframe.
Any solution based on parent.document cannot help me much, since I do not know the ID of the div.aaa.
What I'd like to do is something like $('#myform').closest('div.aaa'), but, of course, this fails because any element beyond the iframe window itself cannot be accessed in this fashion.
How can I best access this iframe's immediate parent div, which is actually an element in it's parent document?
Both parent and iframe are of same origin.
回答1:
You can jump up to the parent window and look for specific iframe in parent document by matching frame element contentWindow to known window inside the iframe
Something like:
$(window.parent.document).find('iframe').filter(function() {
return this.contentWindow === window;
}).parent().doSomething()
DEMO
回答2:
I would recommend to use .closest('.aaa'). But if you could assign a unique identifier you may use .parent('.uniq_selector') that is a bit more performant.
来源：https://stackoverflow.com/questions/53239431/select-the-immediate-parent-element-of-an-iframe-from-the-iframe