I have an iframe on an HTML5 document. when I validate I am getting an error telling me that the attribute on the iframe frameBorder is obsolete and to use CSS instead.
I have this attribute frameBorder="0" here because it was the only way I could figure out how to get rid of the border in IE, I tried border:none; in CSS with no luck. Is there a compliant way to fix this?
Thanks.
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HTML 5 doesn't support attributes such as frameborder, scrolling, marginwidth, and marginheight (which were supported in HTML 4.01). Instead, the HTML 5 specification has introduced the seamless attribute. The seamless attribute allows the inline frame to appear as though it is being rendered as part of the containing document. For example, borders and scrollbars will not appear.
frameborderObsolete since HTML5The value
1(the default) draws a border around this frame. The value0removes the border around this frame, but you should instead use the CSS property border to control borders.
Like the quote above says, you should remove the border with CSS;
either inline (style="border: none;") or in your stylesheet (iframe { border: none; }).
That being said, there doesn't seem to be a single iframe provider that doesn't use frameborder="0". Even YouTube still uses the attribute and doesn't even provide a style attribute to make iframes backwards compatible for when frameborder isn't supported anymore. It's safe to say that the attribute isn't going anywhere soon. This leaves you with 3 options:
frameborder, just to be sure it works (for now)As for the previous state of this decade-old answer:
The seamless attribute has been supported for such a short time (or not at all by some browsers), that MDN doesn't even list it as a deprecated feature. Don't use it and don't get confused by the comments below.
style="border:none; scrolling:no; frameborder:0; marginheight:0; marginwidth:0; "
How about using the same for technique for "fooling" the validator with Javascript by sticking a target attribute in XHTML <a onclick="this.target='_blank'">?
<iframe onload = " this.frameborder='0' " src="menu.html" id="menu"> </iframe>
Or getElementsByTagName]("iframe")1 adding this attribute for all iframes on the page?
Haven't tested this because I've done something which means that nothing is working in IE less than 9! :) So while I'm sorting that out ... :)
Since the frameborder attribute is only necessary for IE, there is another way to get around the validator. This is a lightweight way that doesn't require Javascript or any DOM manipulation.
<!--[if IE]>
<iframe src="source" frameborder="0">?</iframe>
<![endif]-->
<!--[if !IE]>-->
<iframe src="source" style="border:none">?</iframe>
<!-- <![endif]-->
I found a nice work around that will allow it to work in IE7 here. It bypasses the validator for the frameBorder attribute but keeps css for future browsers as explained in the post.
This works
iframe{
border-width: 0px;
}
As per the other posting here, the best solution is to use the CSS entry of
style="border:0;"
Source: Stackoverflow.com