Adjust width and height of iframe to fit with cont

Question

I need a solution for auto-adjusting the width and height of an iframe to barely fit its content. The point is that the width and height can be changed after the iframe has been loaded. I guess I need an event action to deal with the change in dimensions of the body contained in the iframe.

Answer 1

If you can control both IFRAME content and parent window then you need the iFrame Resizer.

This library enables the automatic resizing of the height and width of both same and cross domain iFrames to fit their contained content. It provides a range of features to address the most common issues with using iFrames, these include:

• Height and width resizing of the iFrame to content size.
• Works with multiple and nested iFrames.
• Domain authentication for cross domain iFrames.
• Provides a range of page size calculation methods to support complex CSS layouts.
• Detects changes to the DOM that can cause the page to resize using MutationObserver.
• Detects events that can cause the page to resize (Window Resize, CSS Animation and Transition, Orientation Change and Mouse events).
• Simplified messaging between iFrame and host page via postMessage.
• Fixes in page links in iFrame and supports links between the iFrame and parent page.
• Provides custom sizing and scrolling methods.
• Exposes parent position and viewport size to the iFrame.
• Works with ViewerJS to support PDF and ODF documents.
• Fallback support down to IE8.

Answer 2

This is how I would do it (tested in FF/Chrome):

<script type="text/javascript" src="http://code.jquery.com/jquery-1.9.1.min.js"></script>
<script type="text/javascript">
function autoResize(iframe) {
    $(iframe).height($(iframe).contents().find('html').height());
}
</script>

<iframe src="page.html" width="100%" height="100" marginheight="0" frameborder="0" onload="autoResize(this);"></iframe>

Answer 3

This is how I did it onload or when things change.

parent.jQuery("#frame").height(document.body.scrollHeight+50);

Answer 4

If the iframe content is from the same domain this should work great. It does require jQuery though.

$('#iframe_id').load(function () {
    $(this).height($(this).contents().height());
    $(this).width($(this).contents().width());
});

To have it resize dynamically you could do this:

<script language="javaScript">
<!--
function autoResize(){
    $('#themeframe').height($('#themeframe').contents().height());
}
//-->
</script>
<iframe id="themeframe" onLoad="autoResize();" marginheight="0" frameborder="0" src="URL"></iframe>

Then on the page that the iframe loads add this:

<script language="javaScript">
function resize()
{
    window.parent.autoResize();
}

$(window).on('resize', resize);
</script>

Answer 5

If the content is just a very simple html, the simplest way is to remove the iframe with javascript

html:

<div class="iframe">
    <iframe src="./mypage.html" frameborder="0" onload="removeIframe(this);"></iframe>
</div>

javascript:

function removeIframe(obj)(
    var iframeDocument = obj.contentDocument || obj.contentWindow.document;
    var mycontent = iframeDocument.getElementsByTagName("body")[0].innerHTML;
    obj.remove();
    document.getElementsByClassName("iframe")[0].innerHTML = mycontent;
}

Answer 6

This is a solid proof solution

function resizer(id)
{

var doc=document.getElementById(id).contentWindow.document;
var body_ = doc.body, html_ = doc.documentElement;

var height = Math.max( body_.scrollHeight, body_.offsetHeight, html_.clientHeight, html_.scrollHeight, html_.offsetHeight );
var width  = Math.max( body_.scrollWidth, body_.offsetWidth, html_.clientWidth, html_.scrollWidth, html_.offsetWidth );

document.getElementById(id).style.height=height;
document.getElementById(id).style.width=width;

}

the html

<IFRAME SRC="blah.php" id="iframe1"  onLoad="resizer('iframe1');"></iframe>