32239 2009-12-07 13:17:22 -0800 implement Object.seal() / isSealed() 2011-03-31 10:28:43 -0700 1 1 1 Unclassified WebKit JavaScriptCore 528+ (Nightly build) All All RESOLVED FIXED ES5, InRadar P2 Normal --- 32241 0 pmuellr webkit-unassigned arv erights mike oliver skyul webmaster oldest_to_newest 169448 0 pmuellr 2009-12-07 13:17:22 -0800 For ES5, Object.seal() and Object.isSealed() are required, but not yet supported by JSC. 169773 1 pmuellr 2009-12-08 13:38:56 -0800 I believe this functionality will be relatively straight-forward to add after Object.isExtensible() / preventExtensions() is implemented. That functionality is required for seal() / unseal()'s implementation. 236749 2 mrowe 2010-06-11 02:39:30 -0700 <rdar://problem/8082777>