On 4/30/15 3:46 PM, C. Scott Ananian wrote:
I like the idea of snapshot methods, but they can be implemented in user code using subclasses in ES6.
Can they? You can't create immutable snapshots in user code afaict...
But that would still have required an explicit test in Map.clear/set/delete to ensure that they were operating on an instanceof Map and not just on a ReadOnlyMap.
More likely an internal slot check, not an instanceof check. -Boris _______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
