he/him 
That changes semantics. Arrow functions don’t have a prototype, so it’s a lossy transform and so no minifier can do it safely.
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Sure, the Closure compiler can do it, but that’s not usable in many existing projects.
I mean, it’s a pretty basic analysis if it’s all lexical. But most functions escape and unless you have complex scape analysis it’s difficult but doable. Sorry if it seemed I was talking in absolutes. The minifiers the community use today just aren’t equipped.
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I didn't see an absolute in your earlier comments. Am trying to make Closure Compiler more approachable for Open Source Projects and this looks like a clear win for that work.
Thanks. Twitter will use this to make your timeline better. UndoUndo
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