- From: Tab Atkins Jr. <jackalmage@gmail.com>
- Date: Fri, 21 Jun 2013 09:28:47 -0700
- To: Bjoern Hoehrmann <derhoermi@gmx.net>
- Cc: Daniel Glazman <daniel.glazman@disruptive-innovations.com>, www-style list <www-style@w3.org>
On Fri, Jun 21, 2013 at 5:28 AM, Bjoern Hoehrmann <derhoermi@gmx.net> wrote: > * Daniel Glazman wrote: >>On 21/06/13 09:43, Tab Atkins Jr. wrote: >>> On Thu, Jun 20, 2013 at 11:39 PM, Vsevolod Vlasov <vsevik@chromium.org> wrote: >>>> TLDR: I'd like background-image: url("") to have the same behavior as >>>> background-image: none; in CSS. >>> >>> That would be a weird and invasive change for such an obvious >>> implementation bug. "" is a perfectly valid relative url, and it's >>> certainly possible for it to evaluate to an image, or anything else. >>> It seems pretty clear that we should just fix the error in Blink, not >>> spread a hack around the issue to CSS itself. >> >>Absolutely. Content negociation makes it possible to reply >>an image to that URL. It really seems you're trying to fix >>a browser-specific issue with a global hack. > > The empty string is a same-document reference and should not result in a > retrieval action, just like clicking on <a href='#example'> should not > result in the browser reloading the document. Not quite. While anything with a hash in it is a same-doc reference, a url without a hash *should* be re-retrieved (subject to caching semantics, etc.). Clicking on <a href="">I'm a self link!</a> reloads the page, as it should, while <a href="#">I'm a hash link!</a> does not. > Since text/css resources > are not images, there is no background image that could be rendered. If > the declaration is in a HTML or SVG document, you would have a cyclic > dependency (the document has to be rendered to render its background), > and if CSS does not define how to break the cycle, there is nothing to > render either. See <http://tools.ietf.org/html/rfc3986#section-4.4>. CSS doesn't allow you to render HTML documents as images, but the SVG case is definitely interesting. ~TJ
Received on Friday, 21 June 2013 16:29:33 UTC