Run JQuery in the context of another frame

问题

The client I am working with has a frameset like so...

<frameset rows="100,*, 0">
  <frame name="theFrame" id="theFrame" src="blah.html" >
  <frame name="theSecondFrame" id="theSecondFrame" src="foo.html" >
  <frame name="importantFrame" id="importantFrame" src="myFrame.html" >
</frameset>

When a certain action takes place I need my frame (importantframe which is currently hidden) to mostly take over the page and block any interaction with the other frames. I'm planning on blocking interaction using the jquery block UI plugin.

The problem is I can't actually change the foo.html or blah.html files. So the JS code cannot live there. What I need to do is execute my jquery code in the context of those frames. So just to recap, I need my JQuery code to live in myFrame.html but execute in the context of the other frames. How can I do that? Hope that makes sense.

Thanks CDR

回答1:

The jQuery function, which you more commonly call with $, takes a second argument called context, which is "which DOM element of jQuery object should I do the search in". Most of the time you omit this argument, so the context defaults to the current HTML document. When your code is executing in the iframe, the document defaults to that iframe's document. But you can easily grab the document for one of the other frames.

For example, put this in myFrame.html, and this will remove all the h1 elements from the frame with blah.html in it. Notice the second argument to $, which is the expression that grabs the blah frame from within important frame:

<html>
  <head>
    <script type="text/javascript" src="/javascripts/jquery.js"></script>
    <script type="text/javascript">
      function doIt() {
        $('h1', window.parent.frames[0].document).remove()
      }
    </script>
  </head>
  <body>
    <h1>My Frame</h1>
    <a href="#" onclick="doIt()">Do It</a>
  </body>
</html>

回答2:

Like pjb3 said, set the jQuery context. If you have nested frames, your code will look like this:

$('*',window.parent.frames[0].frames[0].document).size();

Or, better yet, make a shortcut:

targetFrame = window.parent.frames[0].frames[0].document;
$('*',targetFrame).size();

回答3:

I'm not certain about the block plugin, but can't you get hold of the relevant frame and manipulate it using the "frame tree", something like this: (from within importantFrame.htm)

parent.theFrame.someProperty = someValue;

eg:

parent.theFrame.location.href='anotherPage.html';

From what I've been reading, you might need Jquery on the target page, but you could try something like:

parent.theFrame.block();

or maybe:

$('#theFrame').block();

回答4:

In versions of jQuery >=1.7 we cannot get events old way

Older versions (<1.7):

var events = $('#form').data('events');

1.7 and newer:

var events = $.fn.data($('#form'), 'events');

来源：https://stackoverflow.com/questions/539504/run-jquery-in-the-context-of-another-frame

标签

jquery

html

frames