122018 2013-09-27 09:53:51 -0700 WebIDL attributes should be configurable 2014-10-27 08:44:33 -0700 1 1 1 Unclassified WebKit DOM 528+ (Nightly build) All All RESOLVED FIXED http://www.w3.org/TR/WebIDL/#es-attributes P2 Major --- 122213 1 arv webkit-unassigned barraclough cdumez darin ggaren oliver rniwa sam zan zimbabao oldest_to_newest 933978 0 arv 2013-09-27 09:53:51 -0700 > Object.getOwnPropertyDescriptor(document, 'documentElement') < Object configurable: false enumerable: true value: html writable: false __proto__: Object This is a spec violation in a few ways but this bug is only about the configurable bit. It should only be false for [Unforgable]. 1044225 1 zimbabao 2014-10-27 03:46:57 -0700 As of today Object.getOwnPropertyDescriptor(document, 'documentElement') returns undefined. 1044242 2 oliver 2014-10-27 08:12:30 -0700 documentElement (and the majority of dom attributes) are accessor members on the prototype chain. 1044243 3 zimbabao 2014-10-27 08:44:33 -0700 But the values are still not configurable. Object configurable: false enumerable: true get: undefined set: undefined __proto__: Object Is this being tracked at https://bugs.webkit.org/show_bug.cgi?id=49739 ?