76365 2012-01-15 22:17:44 -0800 A radio button should be "required" if one of a member of the same group has the "required" attribute. 2012-01-24 18:08:17 -0800 1 1 1 Unclassified WebKit Forms 528+ (Nightly build) All All RESOLVED FIXED P2 Normal --- 74909 1 tkent tkent oldest_to_newest 536365 0 tkent 2012-01-15 22:17:44 -0800 <form> <input type=radio name=group1 required id=radio1> <input type=radio name=group1 id=radio2> </form> radio2 is always valid in WebKit because it has no "required". This is a behavior described in old HTML5 draft. The current HTML specification says radio2 should be invalid because radio1 has required and there is no checked radio button in the group. 541930 1 tkent 2012-01-24 18:08:17 -0800 The behavior was fixed by http://trac.webkit.org/changeset/105710