- From: Antonio Zamora <antonio_zamora@verizon.net>
- Date: Sat, 3 Sep 2011 00:45:40 -0400
- To: www-validator@w3.org
David, Based on the description that you have quoted, the validator is right. However, the lack of a percentage specification would be a great handicap for authors. Sometimes, it is necessary to completely fill a <div> with the contents referenced by an <iframe>. In this case using width="100%" is the perfect solution. Otherwise, the rendering looks chopped off when the browser display area shrinks or stretches beyond the number of pixels specified in the iframe. Specifying a fixed number of pixels also results in more frequent display of multiple vertical scroll bars: one for the iframe, and another one for the container web page. I have coded the following web page as an example of an <iframe> with width="100%". The iframe adjusts as the size of the browser window is adjusted. This would not be possible by coding a specific number of pixels. http://www.scientificpsychic.com/health/healthfr0.html By the way, the w3schools.com site lists percentage values under size and width for iframes, and I am glad that the major browsers support them. http://www.w3schools.com/html5/tag_iframe.asp As a side note, I would like to note that I have been forced to code frameborder="0" on iframes even though frameborder is obsolete because IE does not recognize style="border:0;" in the iframe and the "seamless" attribute is not implemented in any browser yet. Antonio Zamora http://www.scientificpsychic.com/ === From: David Dorward <david@dorward.me.uk> Date: Sun, 6 Feb 2011 23:23:59 +0000 Cc: www-validator@w3.org Message-Id: <7E01EBDD-A428-4EC6-8482-D4FC4B15088A@dorward.me.uk> To: Jan Bassez <janbassez@gmail.com> On 6 Feb 2011, at 18:32, Jan Bassez wrote: > <iframe name="info" src="owstone.html" seamless="seamless" width="100%" height="45px" style="overflow: hidden;"></iframe> > > this gives an error in the validator for html 5 -> > Bad value 100% for attribute width on element iframe: Expected a digit but saw % instead. > Bad value 45px for attribute height on element iframe: Expected a digit but saw p instead. > > Technically the px can be left away, but the % for sure not. In HTML 4, the height and width attributes take a Length value: http://www.w3.org/TR/html4/types.html#type-length Thus 100% is fine, but 45px is an error since it isn't a plain integer value. In HTML 5, however: http://www.w3.org/TR/html5/the-map-element.html#dom-dim-width > The width and height attributes on img, iframe, embed, object, > video, and, when their type attribute is in the Image Button state, > input elements may be specified to give the dimensions of the visual > content of the element (the width and height respectively, relative > to the nominal direction of the output medium), in CSS pixels. The > attributes, if specified, must have values that are valid non-negative > integers. This removes the percentage option provided by HTML 4 (possibly an error on the part of the spec authors, since they tend not to remove things from HTML 4), but maintains the "Do not specify units" rule for pixel values. In short, the validator is right and this is not a bug. -- David Dorward http://dorward.me.uk
Received on Saturday, 3 September 2011 04:46:10 UTC