How do I refer to the document object of an <iframe> from the parent page, using jQuery?

Question

I'm trying to access the document object of a page that lives in an <iframe> from the host page. In other words, I have a page that has an <iframe> in it, and I want to use jQuery on that page (the parent page) to access the document object of that <iframe>.

Specifically, I'm trying to find the height of the <iframe>d document once its content is rendered (onload) so that I can then resize the <iframe> from the parent page to match the height of the <iframe>'s content exactly.

If it's important, this <iframe> is created on the host page using JavaScript, and is in the same domain as the parent page. I already use this type of code:

$('iframe').contents().find('body').append('<p>content</p>');

to populate the <iframe> with content, but I don't know the exact syntax for getting the <iframe>'s document object.

For some reason I'm finding a lot of ways to access the parent's document object from within an <iframe> (most with plain JavaScript), but not the other way around.

Thanks in advance for any help!

Answer 1

$('iframe').contents().get(0)

or

$('iframe').contents()[0]

will return the document of the first iframe on the page. Remember jQuery objects are arrays of the matching DOM elements