he/him 
confused by the lack of Map/WeakMap support in 6to5
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@sebmck the compile target is es5, so yeah it's a bug; in node it's global env, in browser it's window; it's a bug
@jasonmulligan In that issue if you want non-ES6 behaviour, although I'd strongly discourage it. You shouldn't be relying on that behaviour.
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@sebmck that's an opinion, and the fact is it's legal in es5, and we're talking about targeting es5; it's rewriting for no reason -
@jasonmulligan It's not an opinion. It's spec behaviour. - 8 more replies
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@sebmck this is not es6 validation... that's not why i use 6to5/babelThanks. Twitter will use this to make your timeline better. UndoUndo
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