- From: Bjoern Hoehrmann <derhoermi@gmx.net>
- Date: Thu, 07 Jun 2012 18:50:51 +0200
- To: Lea Verou <leaverou@gmail.com>
- Cc: www-style list <www-style@w3.org>
* Lea Verou wrote: >I recently got into two separate unrelated discussions [1] [2] about >whether the failing (in WebKit) :nth-*(-n-1) tests in css3test.com [3] >should be removed, as these selectors would never match any element so >it's supposedly OK if browsers consider it invalid syntax. Apparently >the confusion arose from this excerpt from css3-selectors [4]: " The >value a can be negative, but only the positive values of an+b, for n?0, >may represent an element in the document tree.". I think it's quite >obvious that throwing an error on such cases is non-conforming, since >the syntax is perfectly valid according to the grammar, [...] That is correct, there are many ways to write selectors that do not match anything, and for :not for instance the specification notes as much, as a reminder that matching no elements does not make selectors invalid. -- Björn Höhrmann · mailto:bjoern@hoehrmann.de · http://bjoern.hoehrmann.de Am Badedeich 7 · Telefon: +49(0)160/4415681 · http://www.bjoernsworld.de 25899 Dagebüll · PGP Pub. KeyID: 0xA4357E78 · http://www.websitedev.de/
Received on Thursday, 7 June 2012 16:51:20 UTC