32721 2009-12-18 10:17:07 -0800 Allow Reserved Words in Object Literals 2011-01-24 07:32:52 -0800 1 1 1 Unclassified WebKit JavaScriptCore 528+ (Nightly build) PC OS X 10.5 RESOLVED DUPLICATE 42471 ES5 P2 Normal --- 1 joepeck webkit-unassigned erights inimino jwalden+bwo pmuellr skyul oldest_to_newest 173212 0 joepeck 2009-12-18 10:17:07 -0800 Currently JavaScriptCore does not allow reserved words as property names in Object Literals: jsc> var x = { import: 1 }; Exception: SyntaxError: Parse error Other browsers seem to allow this right now. The above works in Chrome 4, FF 3.5, and Opera 10. The Grammar rules are different. Notice that the last step is different (IdentifierName instead of Identifier). ES3: ObjectLiteral → PropertyNameAndValueList → PropertyName → Identifier ES5: ObjectLiteral → PropertyNameAndValueList → PropertyAssignment → PropertyName → IdentifierName Workaround: (this is what JSON ended up doing) jsc> var x = { 'import': 1 }; jsc> x['import']; // 1 177676 1 pmuellr 2010-01-06 11:50:00 -0800 See also Bug 32721, as that bug and this one can possibly be addressed with the similar patch to the grammar. 339002 2 jwalden+bwo 2011-01-24 07:32:52 -0800 *** This bug has been marked as a duplicate of bug 42471 ***