History of Object.preventExtensions() Revision history for: English (US) Oct 15, 2016, 5:45:02 PM m_gol Safari support updates Previous Jul 25, 2016, 4:54:57 AM eduardoboucas Add "Return value" section as per Bug 1287421 Previous Jan 4, 2016, 3:33:54 AM fscholz add ES draft Previous Aug 3, 2015, 7:25:39 AM fscholz add Reflect.preventExtensions Previous Jul 9, 2015, 6:18:28 AM fscholz minor cleaning Previous Jun 19, 2015, 5:00:26 AM fscholz clear review flag; cleanup Previous Jun 18, 2015, 9:27:17 AM jrencz ES6 behavior for non-object argument for Opera Previous Jun 18, 2015, 3:14:52 AM jrencz Define ES6 behavior for non-object argument for Chrome and IE Previous Nov 25, 2014, 7:01:17 AM claudepache Previous Oct 2, 2014, 5:41:26 AM teoli