Should all class objects be dynamic?

[lth]

Class itself is sealed, but all the builtin objects in E262 are dynamic. Should all class objects be dynamic? This would be unfortunate for usability, but legacy code requires it... specifically, “function Foo(){}; Foo.bar = 3;” is not legal in Tamarin but is required for web compatibility. We’d prefer user-defined classes be sealed with respect by default, but builtin E262 objects must be unsealed. Deferred until we can get Edwin’s opinion.

Wiki location => proposals:builtin_classes

[jeffdyer]

Resolution: allow class object's to be dynamic for backward compatibility with ES3. There does not appear to be great inconvenience or risk in doing so.