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iframe setting content

I have been searching for this for days and was wondering if anyone could help me with the answer to this.
So, I am currently building a system which allows users to create html pages which can include css and js links and possibly inline scripts/styles within it.
I want the user to preview their output, i was originally using a div tag and adding the html output to it but as all the extra styles and scripts also affected the parent page, i decided the only option was probably to use an iframe to put the content in.
To stop bootstrap links and Jquery conflicts to the parent element, i need to run the iframe in a sandbox environment from what i know but i have no idea how to set the content of the iframe when its in sandbox mode.
If you try:-
$("example iframe element").contents().find("body").html("example html inline styles etc");
this does not work and blocks access due to the iframe being sandboxed and not allowing the origin.
Sandboxing an iframe seems to be the only way to stop multiple instances of Jquery "one on the parent and one in the iframe" from conflicting, i did try noConflict which seems to work but that does not fix conflicting multiple bootstraps being loaded in the parent and iframe elements.
does anyone know either how to add content at runtime to a iframe that is sandboxed without getting blocked access or a different unique container approach i can use?
i appreciate any help or guidance anyone could give on this as i cannot really find much information about it.

I have finally found out what the problem is with this situation, i do not need a sandboxed iframe as i now know why Jquery and Bootstrap are conflicting without having to sandbox the iframe. I see lots of posts telling you to use something like the code below to put content in an iframe.
$("example iframe element").contents().find("body").html("example html inline styles etc");
the problem with the method above is that its opening the iframe up for putting content inside it but its not specifying the closing of the iframe.
This is why even on a normal none sandboxed iframe Jquery and Bootstrap conflict because its leaking back into your parent page by not being closed. The real method for putting content into an iframe directly should be the code below as it ensures the connection is closed off appropriately.
var myIframe = document.getElementById("ID OF THE IFRAME")
var iframeDoc = myIframe.contentWindow.document;
iframeDoc.open();
iframeDoc.write("HTML HERE");
iframeDoc.close();
by doing the above code you are not only modifying the content inside the iframe but your also closing it off once you have finished writing the content. This is very important in ensuring Iframes stick to their purpose as being a completely isolated page element and it stops js and css leaks into your parent page.
i hope this answer helps save time for anyone else who comes across this particular problem with iframes and is adding content at run time using the wrong method.

Giving iframe properties from inside

So I am currently working on an application that runs on top of the customers page inside its own iframe.
Application works in backbone and everything else except the initialization of the iframe is done inside the iframe. Initialization happens with a small javascript snippet that the client will copy to their footer.
The problem I'm currently having is that I have to inject a CSS file to the parent site in order to style my iframe correctly when it's rendered and I really don't think that I should tamper with clients page at all since CSS might have some conflicts in it.
Is there any better way to style the iframe than the current way of doing it?

I think you have two different options;
Inline iframe styles
Give your client a pre-styled iframe to embed, like this
<iframe src="yoururl.com/client"
frameborder="0"
style="border: 0; width: 100%; height: 600px;">
</iframe>
Embed through script tag
Create a small script tag (that you host) that you give to your client. Inside the script you dynamically create the iframe dom element and possibly other external css-files that you need
Host a JS file, like //yoururl.com/iframe.js
var iframe = document.createElement("iframe");
iframe.setAttribute("src","http://yoururl.com/client");
document.write("<div id='mycontainer'></div>");
document.getElementById("mycontainer").appendChild(iframe);
Then you can give this to your client to put in their page where they want the iframe to show up.
<script src="//yoururl.com/iframe.js" type="text/javascript"></script>

You can provide your css separately to the client. If that is not an option, then you need to do it the way you are doing now (injecting the parent style from within the iframe). However, this does not seem to be a good idea, unless your css rules are pretty unique.

There are many ways but it could be possible that no one is applicable:
Ask the client to style your iframe (inline or with css)
publish the iframed content on the same domain of the main website and check if the parent frame is accessible via javascript
Ask the Client to enable the header "X-Frame-Options". Maybe with something like "ALLOW-FROM SAMEDOMAIN, www.youriframedomain.com". It seems it is deprecated, check for Content-Security-Policy instead.
embed it via script tag
Check for window.postMessage: it requires anyway an additional script in the main website that listens for the message (it could be the css text itself) from the iframe and applies the new style

You should be able to use window.frameElement to refer to the iframe element which your page is embedded in. With that reference, you should be able to modify the style attribute to change how the frame renders.

How to add CSS property to elements outside iframe?

I'm sorry if this wasn't the right place to ask. I'm having trouble figuring this one out.
What I'm trying to do is removing the demo bar provided by marketplaces like themeforest or mojothemes within my own demo site.
But since what appears in the marketplace's live demo of a theme is fetched, it appears within an iframe inside of their site.
I've tried asking in their forums but no one has been helpful.
Is there any way to do about this? An example done in a marketplace would be great.

The Answer is No. It is not possible to modify dome elements outside iframe by a script on site in iframe.
Reason: Since The Marketplace website is Accessing your Demo Site within iFrame at thier server.
Like how you embed a YouTube Video on your Page and Specify a Heading above it etc, does youtube or google map ever try to change their container styles? do they ever change the heading you wrote above the embed code?
Thats it

You cannot (due to the Cross Site Scripting - http://en.wikipedia.org/wiki/Cross-site_scripting) as it is a separated document. But what You can do is to use Web Messenging: http://en.wikipedia.org/wiki/Web_Messaging to affect JS/CSS within the iframe (but this will require actions on both sides).

If you can execute Javascript from within an iframe you can change the elements outside of it with the Window parent Property. Example usage:
parent.document.body.style.backgroundColor = "red";
changes the background of the <body> outside of the iframe.

What are the differences between iframe and innerHTML

I was doing an innerHTML on a div element. MY lead comes and tells me that innerHTML and iFrame are both the same. Now this one was something new. I always thought InnerHTML to be different from iFrame.
[My lead]: "The issue is because he is trying to use innerHTML which
in turn is called as IFRAME for a browser"
I wanted to know the differences between an iFrame and innerHTML. Are they both essentially similar in nature? I looked but couldn't find much.
Thanks

Sounds like a communication error--e.g., if your lead means that the innerHTML of that div is just going to show an iframe as its innerHTML (or otherwise, it would sound like you need a new lead). innerHTML grabs the HTML code as a string inside of the selected element. An iframe is an element used for transcluding content (usually from other sites or other pages on your own site). Apples and oranges...

They're very different. An iframe tells the browser to load a different URL in the iframe, and it will often have it's own scrolls. But a div can be made to look and work like an iframe by setting
overflow: auto
- in the style. Maybe that's what he meant.

iframe is an HTML tag used for displaying another website or page on your page, innerHTML is used in Javascript to change the content of an element on your webpage.
They are completely different.

They are not the same. Innerhtml is a way to access the contained html of an html element. An iframe is an element that let's you display content from a different web page than the one you're currently on.

Creating a Simple Layout/Style Editor

I am trying to create a layout/style editor similar to what is available on blogger. I noticed that they use an iframe, but the iframe has to refresh everytime you make a change. I am looking to do something more responsive. For example, if i change the width of a div I would like to see this change happening while I move the slider.
I was wondering if something like this is possible with the iframe setup using jquery/etc to modify the source of what is in the iframe, or is it better to not use an iframe?
The iframe would be used to load an existing webpage that is online.

The good thing with an iframe is that is not interfeering the rest of the page (you can use diffrent CSS, scripts, variable names and so on). TinyMCE and other editors uses iframe for its content. And yes its possible to access the iframe directly from jQuery:
See this link, http://jsbin.com/ajatix/edit#javascript,html,live