- From: L. David Baron <dbaron@dbaron.org>
- Date: Sat, 8 Jun 2013 16:14:37 +0900
- To: www-style@w3.org
Glenn Adams pointed out to me at today's Test the Web Forward event in Tokyo that the rules in http://dev.w3.org/csswg/cssom/#serializing-selectors for serializing :nth-child(an+b) forms drop signs. This changes the meaning of selectors during serialization, which is incorrect. In particular, this rule: # 4. If a is one or minus one and b is zero let the value be "n" # (U+006E). omits the sign on a. There is a semantic difference between :nth-child(n) (which matches all elements) and :nth-child(-n) (which matches none) that is lost by this rule. Likewise: # 5. If a is one or minus one let the value be "n" (U+006E), # followed by "+" (U+002B) if b is positive, followed by b # serialized as <integer>. also omits the sign on a. This loses the semantic difference between :nth-child(-n+2) which matches only the first or second child, and :nth-child(n+2) which matches all children except the first. -David -- 𝄞 L. David Baron http://dbaron.org/ 𝄂 𝄢 Mozilla http://www.mozilla.org/ 𝄂
Received on Saturday, 8 June 2013 07:15:01 UTC