This should help you: http://2ality.com/2015/11/tc39-process.html http://2ality.com/2015/11/tc39-process.html Basically, it's just a proposition for the moment

This should help you: http://2ality.com/2015/11/tc39-process.html http://2ality.com/2015/11/tc39-process.html Basically, it's just a proposition for the moment, there's no telling if that's gonna be in the language or not. It's only at stage 2 that it is likely that the feature will be added in the language.