It is a feature indeed. MDC points out to MSDN specs. https://developer.mozilla.org/en/DOM/element.offsetWidth http://msdn.microsoft.com/en-us/library/ms534304(VS.85).aspx
But it's a CSSOM documented feature: http://www.w3.org/TR/cssom-view/#offset-attributes The offsetHeight attribute, when called on element A, must return value > that is the result of the following algorithm: > > 1. If element A does not have an associated CSS layout box return zero > and stop this algorithm. > 2. Return the number of CSS pixels of the border box height of element A. > Quirks mode have this tested and working across multiple browsers: http://www.quirksmode.org/dom/w3c_cssom.html#offsetParent On the other side I've made a test case to see if this could break plugins and code that uses animations or other ways to set width to zero. Today jquery supports :visible to be true when offsetWidth is 0. In my example I've used animate({width:0,height:0}) : http://irae.pro.br/jquerytests/offsetWidth.html IMHO, jQuery could use something like: if(elem.offsetWidth > 0) { return true; } else { // current way of detecting visibility } --Iraê On Sat, Jan 17, 2009 at 11:55 AM, John Resig <jere...@gmail.com> wrote: > > > Wow, that is sweet. For years I've had to deal with offsetWidth being > > 0 on hidden-by-parent elements, but never thought of using it as a > > feature! > > Yeah, the tables have finally turned! We can use this stupid > bug/feature to our advantage. > > --John > > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "jQuery Development" group. To post to this group, send email to jquery-dev@googlegroups.com To unsubscribe from this group, send email to jquery-dev+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/jquery-dev?hl=en -~----------~----~----~----~------~----~------~--~---
