We Keep Coding

iframe auto height without scroll doesn't work

I have a page that contains an iframe. I have tried to remove the scroll with the attribute scrolling=no and scroll='no' but without result.
So I want it to be able to adjust its height according to the contents inside it, without using scroll.
Here is my code:
<script>
function resizeIframe(obj) {
obj.style.height = obj.contentWindow.document.body.scrollHeight + 'px';
}
</script>
<iframe src="" frameborder="0" onload="resizeIframe(this)" scrolling="no > </iframe>

I dont fully understand what you are trying to accomplish here and I presume the Iframe doesnt provide an API to handle this for you.
No scrolling:
Its a workaround but: fix this by wrapping the Iframe with a div, putting it on top of it with z-index. The cursor will not access the Iframe like this. Also want to be able to click it? Add an onclick function removing the diff or the css of the div.
Altering the height:
Just dont specify height and width and the IFrame will handle this for you?
About the code:
Im not familiar with the onload function but presuming it runs after the loading of the Iframe...
obj.style.height
should be
obj.height

Resize iframe height according to resizable content

I have an iframe and I want to re-size the height according to the content which may resize if user makes certain actions.
I don't want a scroll bar so it appears as a normal page

Use a div instead of an iFrame. Try posting some sample code so we can help you more. Generally, you cannot resize an iframe based on its content.

scrollHeight is the major property to retrieve the height of the IFRAME's content like this:
contentWindow.document.body.scrollHeight
After the IFRAME is loaded, you can then change the height by doing the following:
<script type="text/javascript">
function resizeIframe() {
var iFrameID = document.getElementById('idIframe');
if(iFrameID) {
var cont = iFrameID.contentWindow.document.body || frame.contentDocument.body
// here you can make the height
iFrameID.height = cont.scrollHeight + "px";
}
}
</script>
On the IFRAME load event, you can call this function:
But sure..iframe should not be loaded from other website

Iframe height [dynamic] for every 2 second

my problem is when I load iframe it's set height of iframe correctly and also when data(content) load in iframe it;s automatically set height ,BUT when page load in iframe and set height relatively page content and then if I reduce or delete content from loaded page it will not reduce iframe height.(e.g when page load first time height set 100px and dynamically load data on page iframe height set to 150px and when I reduce data it's not set height of iframe it remain 150px). This is my code:
function setIframeHeight(iframe) {
if (iframe) {
var iframeWin = iframe.contentWindow || iframe.contentDocument.parentWindow;
if (iframeWin.document.body) {
iframe.height = iframeWin.document.documentElement.scrollHeight || iframeWin.document.body.scrollHeight;
}
setInterval("setIframeHeight_id('" + iframe.id + "')", 2000);
}
return false;
}
function setIframeHeight_id(iframeid) {
var iframe = document.getElementById(iframeid);
if (iframe) {
var iframeWin = iframe.contentWindow || iframe.contentDocument.parentWindow;
if (iframeWin.document.body) {
iframe.height = iframeWin.document.documentElement.scrollHeight || iframeWin.document.body.scrollHeight;
}
}
return false;
}
function resizeIframe(nm) {
setIframeHeight(document.getElementById(nm));
}
HTML
<iframe id="IframeData" scrolling="no" frameborder="0" width="100%" onload="resizeIframe('IframeData')" allowtransparency="true"></iframe>

I would highly suggest you to use jQuery instead of plain JavaScript. It won't do a miracle by itself, but will sure help you shorten your code.
When it comes to your problem, why not using percentage sizes instead of fixed pixel size? Let's say your iframe's height is set to 100%, instead of 150px. By doing this way, next time you resize the parent container, the iframe itself will stretch to parent's height.
I hope this helps.

Resize external website content to fit iFrame width

I have a webpage with 2 iFrames in it. Both of them are with fixed width and height. I am loading external websites inside them. How can I resize those external websites width to fit with the iFrame (like mobile browsers does by changing viewport)?

What you can do is set specific width and height to your iframe (for example these could be equal to your window dimensions) and then applying a scale transformation to it. The scale value will be the ratio between your window width and the dimension you wanted to set to your iframe.
E.g.
<iframe width="1024" height="768" src="http://www.bbc.com" style="-webkit-transform:scale(0.5);-moz-transform-scale(0.5);"></iframe>

Tip for 1 website resizing the height. But you can change to 2 websites.
Here is my code to resize an iframe with an external website. You need insert a code into the parent (with iframe code) page and in the external website as well, so, this won't work with you don't have access to edit the external website.
local (iframe) page: just insert a code snippet
remote (external) page: you need a "body onload" and a "div" that holds all contents. And body needs to be styled to "margin:0"
Local:
<IFRAME STYLE="width:100%;height:1px" SRC="http://www.remote-site.com/" FRAMEBORDER="no" BORDER="0" SCROLLING="no" ID="estframe"></IFRAME>
<SCRIPT>
var eventMethod = window.addEventListener ? "addEventListener" : "attachEvent";
var eventer = window[eventMethod];
var messageEvent = eventMethod == "attachEvent" ? "onmessage" : "message";
eventer(messageEvent,function(e) {
if (e.data.substring(0,3)=='frm') document.getElementById('estframe').style.height = e.data.substring(3) + 'px';
},false);
</SCRIPT>
You need this "frm" prefix to avoid problems with other embeded codes like Twitter or Facebook plugins. If you have a plain page, you can remove the "if" and the "frm" prefix on both pages (script and onload).
Remote:
You need jQuery to accomplish about "real" page height. I cannot realize how to do with pure JavaScript since you'll have problem when resize the height down (higher to lower height) using body.scrollHeight or related. For some reason, it will return always the biggest height (pre-redimensioned).
<BODY onload="parent.postMessage('frm'+$('#master').height(),'*')" STYLE="margin:0">
<SCRIPT SRC="path-to-jquery/jquery.min.js"></SCRIPT>
<DIV ID="master">
your content
</DIV>
So, parent page (iframe) has a 1px default height. The script inserts a "wait for message/event" from the iframe. When a message (post message) is received and the first 3 chars are "frm" (to avoid the mentioned problem), will get the number from 4th position and set the iframe height (style), including 'px' unit.
The external site (loaded in the iframe) will "send a message" to the parent (opener) with the "frm" and the height of the main div (in this case id "master"). The "*" in postmessage means "any source".
Hope this helps. Sorry for my english.

Making an iframe take vertical space

I would like to have an iframe take as much vertical space as it needs to display its content and not display a scrollbar. Is it at all possible ?
Are there any workarounds?

This should set the IFRAME height to its content's height:
<script type="text/javascript">
the_height = document.getElementById('the_iframe').contentWindow.document.body.scrollHeight;
document.getElementById('the_iframe').height = the_height;
</script>
You may want to add scrolling="no" to your IFRAME to turn off the scrollbars.
edit: Oops, forgot to declare the_height.

The workaround is not to use <iframe> and preprocess code on server-side.

Also check out this thread: How does the DiggBar dynamically resize its iframe's height based on content not on their domain?.
It addresses the same question.

This CSS snippet should remove the vertical scrollbar:
body {
overflow-x: hidden;
overflow-y: hidden;
}
I'm not sure yet about having it take up as much vertical space as it needs, but I'll see if I can't figure it out.

Adding a DOCTYPE declaration to the IFRAME source document will help to calculate the correct value from the line
document.getElementById('the_iframe').contentWindow.document.body.scrollHeight
see W3C DOCTYPE for examples
I was having problems with both IE and FF as it was rendering the iframe document in 'quirks' mode, until I added the DOCTYPE.
FF/IE/Chrome support: The .scrollHeight doesnt work with Chrome so I have come up with a javascript example using jQuery to set all IFRAME heights on a page based on the iframes content. NOTE: This is for reference pages within the your current domain.
<script type="text/javascript">
$(document).ready(function(){
$('iframe').each(function(){
var context = $(this);
context.load(function(event){ // attach the onload event to the iframe
var body = $(this.contentWindow.document).find('body');
if (body.length > 0 && $(body).find('*').length > 0) { // check if iframe has contents
context.height($(body.get(0)).height() + 20);
} else {
context.hide(); // hide iframes with no contents
}
});
});
});
</script>