9167 2010-02-27 21:51:48 +0000 Must not contain periods(".") de id and class, (and posible not #, :, {) because is not accesible from CSS . example in html id="name.last" in CSS selectors is imposible to select it because will search form id name class last. In html is possible use 2010-10-04 14:55:36 +0000 1 1 1 Unclassified HTML WG pre-LC1 HTML5 spec (editor: Ian Hickson) unspecified Other other RESOLVED INVALID http://www.whatwg.org/specs/web-apps/current-work/#the-id-attribute P3 normal LC 1 contributor ian ian mike Ms2ger public-html-admin public-html-wg-issue-tracking public-html-bugzilla oldest_to_newest 32726 0 contributor 2010-02-27 21:51:48 +0000 Section: http://www.whatwg.org/specs/web-apps/current-work/#the-id-attribute Comment: Must not contain periods(".") de id and class, (and posible not #, :, {) because is not accesible from CSS . example in html id="name.last" in CSS selectors is imposible to select it because will search form id name class last. In html is possible use periods in the id and is not too coherent when using CSS Posted from: 88.2.233.124 32729 1 Ms2ger 2010-02-28 10:35:38 +0000 *** Bug 9165 has been marked as a duplicate of this bug. *** 32731 2 Ms2ger 2010-02-28 10:35:54 +0000 *** Bug 9166 has been marked as a duplicate of this bug. *** 32732 3 Ms2ger 2010-02-28 10:37:33 +0000 #abc\.def works. Also, this would be a problem for the Selectors specification, not for HTML.