43224 2010-07-29 18:00:23 -0700 [V8] "delete" on IDL attributes that reflect DOM attributes does not match Firefox/Opera 2013-05-29 09:37:24 -0700 1 1 1 Unclassified WebKit DOM 528+ (Nightly build) PC Linux RESOLVED WONTFIX P2 Minor --- 49739 1 ayg japhet arv dominicc jamesr japhet tabatkins oldest_to_newest 258009 0 ayg 2010-07-29 18:00:23 -0700 data:text/html,<!doctype html> <script> var el = document.createElement("a"); delete el.id; alert(typeof el.id); </script> Chrome dev channel (6.0.472.0 (Official Build 53024) dev, WebKit 534.3) outputs "undefined". Firefox and Opera output "string". Discussion in #whatwg concluded that the relevant spec here is WebIDL: http://dev.w3.org/2006/webapi/WebIDL/ But no one who was awake was able to decipher what it actually required here. WebKit seems like the one that's wrong here, but I'm not totally sure on that. 258015 1 ayg 2010-07-29 18:06:08 -0700 Maciej Stachowiak reports that the test gives "string" in Safari, so it's presumably a bug in the V8 bindings. 258016 2 jamesr 2010-07-29 18:06:23 -0700 Hey Nate, looks like a bindings generation bug. 421942 3 dominicc 2011-06-16 07:20:52 -0700 This bug is a consequence of the way V8 bindings are generated. V8 generates IDL attributes as properties on the object. The Web IDL spec specifies them as getters and setters on the object's prototype [1]. If bug 49739 was fixed, this bug would also be fixed as a natural consequence. [1] <http://dev.w3.org/2006/webapi/WebIDL/#es-attributes>