[whatwg] .localName shouldn't change case

[Simon Pieters]

For HTML elements in HTML documents, why is Element.localName uppercased  
for tag names and lowercased for attribute names? I wouldn't expect it to,  
and it makes it harder to write scripts that work for both HTML and XHTML.  
For example, if you want a script to work in both legacy HTML UAs and  
HTML5 UAs as well as in XHTML, you may want to do something like if  
((elm.tagName == "A" && !elm.namespaceURI) || (elm.localName == "a" &&  
elm.namespaceURI == "http://www.w3.org/1999/xhtml";)) to check that a given  
element is an HTML "a" element.

--
Simon Pieters