jQuery.contents() Gives a strange result - javascript

I'm having a very strange occurrence when using an IFrame and jQuery.Contents.
We have a number of reports that are built in seperate pages, and a display page that uses jQuery Tabs to display a number of these pages at once.
These reports are of varying sizes based on the data and the inputs by the user, since they can vary we needed to dynamically set the height of the IFrame to be the height of the contents. To get the height of the contents I am using this following code :
var iframeHeight = $(this).contents().height();
iframeHeight += 50;
console.log(iframeHeight);
This code works fine on first load, but after the IFrame Postsback/Refreshes the iframeHeight that is logged is always 83px more than the previous height, regardless of the actual contents of the child page.
i.e. First report is 500px high,
Second report should be 300px high
but $(this).contents().height(); returns 583px.
Here is an example jsFiddle to demonstrate the problem. If you open the console and then click the JSFiddle Icon in the top left of the IFrame, you will notice that the logged height will be 83px more than the previous.
Is there anything that could explain this issue?
Am I miss-understanding how the jQuery.Contents function works?
If this will not work this way is there a better way to get the content height? (I've tried the height of the body + the height of the form object but this didn't work in IE).
Tested this in IE10 + Chrome Version 31.0.1650.57 m

Here is an implementation that seems to work (for expanding/shrinking contents..)
assuming that iframe's src is from the same domain and that there are not scripts that resize the iframe's contents once loaded
$(document).ready(function() {
$('#frameID').on('load', function () {
$('#ReportBuild').hide()
$(this).show();
var iframeHeight = $(this.contentDocument.documentElement).outerHeight(true);
$(this).css({ height: iframeHeight + 'px' });
this.contentWindow.onbeforeunload = function () {
$('.tabFrame').hide();
$('#ReportBuild').show();
}
});
});
Demo at http://jsfiddle.net/rq5S5/8/

With help I managed to finally find a solution, suggested examples worked on JSFiddle's but would not work when applied to my issue using ASP.NET controls generated on PostBack.
To handle this, on each of my Child pages I have wrapped the entire content inside a <div></div> and retrieved the height of this element.
Example :
<div id="ReportContent">
<!-- HTML Content -->
</div>
And the jQuery Code :
var iframeHeight = $(this).contents().find('#ReportContent').outerHeight(true);
This now works correctly for my problem in both IE10 and Google Chrome Version 31.0.1650.57 m

Related

page has different height when inside an iframe

I've googled a bit and there were a few leads, but I couldn't get any of those leads to work:
I have a page that has an iframe with the src pointing to an external page (cross domain). When the child/iframed page loads, it posts a message of its height. I put a console.log of the height in the javascript. If I open that page in a separate window (type the iframe's src URL in a separate tab, in other words), the console logs the expected height.
However, when I open the parent page with the iframe, the console logs either 0 or a very incorrect value of 150. I've looked through the css and html, and I don't have any specifications of 150.. Anyone have a clue what's going on here?
Abstracted code:
Parent HTML:
...
<iframe src="example.childpage.com" scrolling="no" frameBorder="0"></iframe>
...
Parent Javascript:
...
$(document).ready(function(){
window.addEventListener('message', function(m){
var messageData = m.data;
if(messageData.type=='document-loaded' &&
messageData.hasOwnProperty('height'){
resize_iframe(messageData.height); //function defined else where
//and works
};
});
...
IFrame Javascript:
...
$(document).ready(function(){
var body = document.body;
var html = document.documentElement;
var maxHeight = Math.max(body.scrollHeight, body.offsetHeight,
html.clientHeight, html.scrollHeight, html.offsetHeight);
//Logs height correctly when opened in a separate window but not when
//iframed
console.log("POSTING HEIGHT", maxHeight);
window.parent.postMessage({'type':'document-loaded', 'height': maxHeight},
PARENT_HOST_URL); //PARENT_HOST_URL defined elsewhere
});
...
I realize I have a mixture of jquery and vanilla javascript here; I've done both $(document).height() and the Math.max() shown above to get the height, but both ways still have the same issue.
Much thanks!
ok I finally found a good solution:
$('iframe').load(function() {
this.style.height =
this.contentWindow.document.body.offsetHeight + 'px';
});
Because some browsers (older Safari and Opera) report onload completed before CSS renders you need to set a micro Timeout and blank out and reassign the iframe's src.
$('iframe').load(function() {
setTimeout(iResize, 50);
// Safari and Opera need a kick-start.
var iSource = document.getElementById('your-iframe-id').src;
document.getElementById('your-iframe-id').src = '';
document.getElementById('your-iframe-id').src = iSource;
});
function iResize() {
document.getElementById('your-iframe-id').style.height =
document.getElementById('your-iframe-
id').contentWindow.document.body.offsetHeight + 'px';
}
I had a function that looped through not-yet-accessible elements and called $(element).hide() on them -- which sets the style display: none.
Turns out calculating the height of an element is respective of its visibility on the actual page, regardless of it being in an iframe. So the browser couldn't see it, so the height was being miscalculated (still weird it was returning a random 150px value). That explains why it was calculating correctly on a separate page.
Instead of doing hide(), I just set the visibility to hidden and that fixed my issue of getting the incorrect heights.

Can't fix the width of popup element (colorbox jquery override)

I have the following code on my site that's supposed to show a popup window
<span class="fbridge-signup-form" data-widget-id="21378"></span>
<script type="text/javascript">
(function() {
var secure = ("https:" == document.location.protocol);
var fb_js_host = (secure ? "https://www.fanbridge.com" : "http://widget-platform.fanbridge.com");
window._FBRIDGE_WIDGETS_HOST = fb_js_host; var p, s, id = 'fbridge-widgetjssdk-v1';
p = document.createElement('script'); p.id = id; p.type = 'text/javascript'; p.async = true;
p.src = (secure ? "https://ssl.fbridgecdn.net" : "http://static.fbridgecdn.net") + '/js/fb/widget/v1/platform.js?_=' + ((new Date()).getTime());
s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(p, s);
})();
</script>
It works fine, but the problem is that there's some setting with lightboxes on my Drupal site that makes this window of a smaller width and height than the actual content inside.
I tried getting the element with getElementByClassName or writing the width and heightparameters into the style property of fbridge-signup-form but it didn't work out.
Do you know what I could do to force it to be a certain width and height? Say 480px by 400px?
You can check the actual page on http://waytorussia.net/Moscow/Intro.html (it has a cookie set to show only once).
UPDATE: maybe it's possible to use another kind of popup so this one is not overridden by my other settings?
According to the HTML source, the element you should resize is (id) cboxContent.
But the black frame around it doesn't seem "ready" (from an HTML/Css point of view) to be resized.
See the screenshot here:
I resized it 400x400.
EDIT -
By resizing all the appropriate elements, you can manage to get what you want. Here's an example done manually:
Just inspect the element (right-click > Inspect) with a modern browser, and look at the divs that you need to resize on load (with JavaScript).
i opened your page in Firefox with the developer tools to see how things work width and height wise and the results are interesting.
Basically the frame of the lightbox is made up of numerous divs all seem to be hard coded to a specific width and height. When you hover over the inner content using the inspector tool you can see that the inner content is actually the correct width and height but the container ( your collection of divs is not )
Try expanding the height and width of the container divs using css maybe??
I wouldnt have used this as answer but unfortunately i cant provide screenshots using just the comments section to my knowledge.
To see the image at full screen open it in a new tab.
For a good alternative try colorbox its a great JQuery modal plugin that can be used for just about anything.
Demos are here. Have a look at inline HTML example it seems to be similar to what you need.
Thanks to #Vincent G and #KyleT for their help I found that I had to edit the CSS styles for colorbox module.
#cboxLoadedContent iframe{display:block; min-width: 480px; min-height: 400px; border:0;}
and
#colorbox{min-width: 480px !important; min-height: 400px !important; }
in the colorbox.css file which was part of my Drupal installation.
After that the widget was loading fine.

set fancybox height with jquery

I want to show a fancybox on my page displaying an iframe with a source of another domain that has dynamic height (since within the iframe I'll go to different pages or might have some dynamic content). I have access to the other domain's code as well. So I can use postMessage to send the iframe's source's height to my page. But I can't seem to figure how to change the fancybox's height through code.
I tried setting the height of all the divs that contain the iframe, including the iframe itself:
document.getElementById('fancybox-frame').height = parseInt(height);
document.getElementById('fancybox-content').height = parseInt(height);
document.getElementById('fancybox-outer').height = parseInt(height);
document.getElementById('fancybox-wrap').height = parseInt(height);
and I know that I'm getting the height through all right since it works perfectly on a directly integrated iframe.
Anyone got any ideas?
Thanks
Edit:
I also tried $.fancybox.update() but I'm not really sure on how to implement that:
$.fancybox({
'height': height
});
$.fancybox.update();
Have you tried the built in $.fancybox.update() method? The the documentation suggests (under API Methods) that this method should provide the functionality you're looking for.
Found it, you have to change following attributes
document.getElementById('fancybox-content').style.height = parseInt(height) + 'px';
document.getElementById('fancybox-frame').height = parseInt(height);

Automatic height resize of an iframe, problems with chrome and safari

I need to include an iframe in a page and I want to calculate the correct height and adjust it in order to avoid displaying the vertical scrollbar. I want to display the horizontal scrollbar, though, if needed.
I've found several posts about this problem, but no one works 100%. This is a very common approach I've seen:
$(document).ready(function() {
$('iframe').load(function() {
$("#your-iframe-id").height($("#your-iframe-id").contents().find("html").height()+35);
});
})
<iframe id="your-iframe-id" style="width:100%;border:0;" src="test.php"></iframe>
The problem I've found with this approach is that, with Safari and Chrome, if, navigating into the iframe, I visit a page which is shorter than the previous one, the height of the frame is still the one of the taller page. If, instead, you navigate from a short page to a tall one, everything is working fine. Firefox doesn't have this problem; I didn't try with IE and Opera.
Any help is really appreciated. Thanks in advance.
<script>
var resizeHandle = function()
{
var theFrame = $('.window-content-wrapper', parent.document.body);
theFrame.height($(document).height());
var theFrame = $('.window-content', parent.document.body);
theFrame.height($(document).height());
};
</script>
<iframe id ="home" onResize="resizeHandle()" onload="resizeHandle()" style="width:100%;border:0;" src="test.php"></iframe>

javascript resize iframe height dynamically issue

I'm having an issue resizing an iframe to fit the content located within the frame'd page. I used a suggestion I found here to resize the frame dynamically.
In my frame'd pages I have
<body onload='parent.resizeIframe(getDocHeight())'>
function getDocHeight() {
var D = document;
alert(D.URL);
return Math.max(
Math.max(D.body.scrollHeight, D.documentElement.scrollHeight),
Math.max(D.body.offsetHeight, D.documentElement.offsetHeight),
Math.max(D.body.clientHeight, D.documentElement.clientHeight)
);
}
And in the page containing the iframe I have this
function resizeIframe(newHeight) {
var showsFrame = document.getElementById('frm');
showsFrame.style.height = parseInt(newHeight) +'px';
}
The function is getting called correctly by each frame'd page, but for some reason the 'newHeight' parameter being passed is keeping the largest height value. For example if I have 2 frame'd pages one with a scroll height of 300px and the other with 500px. When I first click my link to load the 300px page it works fine, but if I click the link to the 500px page and then try and come back to the 300px page, the value of 'newHeight' remains at 500. Any ideas? TIA
I found the issue I was having for anyone else that is experiencing the same thing. Because my frame'd pages didn't have much content the scrollHeight was reporting the length of the entire document and not cutting where my content stopped. Instead of trying to calculate scrollHeight, I simply looked for the offsetHeight which was the correct height I was looking for. Firebug is a nice tool to inspect the DOM of each page and see the values of each attribute without having to write debugging messages. I put this line in every frame'd page
<body onload='parent.resizeIframe(getDocHeight())'>
and in a separate js file I have this code to calculate the height.
function getDocHeight() {
var D = document;
return Math.max(
Math.max(D.body.offsetHeight, D.documentElement.offsetHeight),
);
Try it with JQuery
function resizeIframe(newHeight) {
$('#iframeId').attr('height',newHeight);
or
$("#frameId").height(newHeight);
}

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