[whatwg] [Selectors4] case-insensitive attribute value matching (in XML)
ian at hixie.ch
Tue Jun 5 17:04:55 PDT 2012
On Sat, 21 Jan 2012, Leif Halvard Silli wrote:
> Ian Hickson on Fri Jan 20 14:31:01 PST 2012:
> > On Tue, 26 Jul 2011, Christoph Päper wrote:
> >> Anne van Kesteren:
> >> > I'm still trying to get HTML and browsers to change so that attribute
> >> > values always match case-sensitively, irrespective of markup language.
> >> > The current magic attribute list in HTML whose values needs to be
> >> > matched ASCII case-insensitively is just ugly.
> > The spec changed recently in response to Anne's efforts here. If this is
> > an area of interest, I encourage you to study the specification to see if
> > the current requirements are satisfactory.
> The matching rule for attribute names and element names,  doesn't
> match reality, see demo: 
> * Gecko uses ASCII case-insensitive matching (as specced by HTML5)
> * Trident/Webkit/Presto use Unicode caseless matching (variant).
> (Legacy Firefox 3.6 behave like Trident/Webkit/Presto too.)
> The differences affect @data-* and @x-* (and other extensions).
> Shouldn't spec match Trident/WEbkit/Presto?
>  http://dev.w3.org/html5/spec/links#case-sensitivity
>  http://software.hixie.ch/utilities/js/live-dom-viewer/saved/1307
On Fri, 3 Feb 2012, Anne van Kesteren wrote:
> The HTML parser only lowercases A-Z so that behavior is somewhat
> surprising. Quick testing shows it also happens in the DOM (in
> Presto/WebKit at least). I think it should be treated as a bug in
> Trident/WebKit/Presto given how the HTML parser behaves, personally.
I agree with Anne. Unless there's a compelling compatibility reason, the
ASCII variant seems better. It has the advantage of being more performant, too.
Ian Hickson U+1047E )\._.,--....,'``. fL
http://ln.hixie.ch/ U+263A /, _.. \ _\ ;`._ ,.
Things that are impossible just take longer. `._.-(,_..'--(,_..'`-.;.'
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