There are two issues here. 1. Features related to scoping are hard for us because the frontend is a mess. It could be hacked in... Seems bad. 2. I heard V8 had a very hard time figuring out exactly what the semantics should be, so ... ideally there would be a clear description of what they did to work from, but I haven't seen that. I guess I could ask devsnek what he thinks of <https://github.com/bmeck/js-repl-goal/issues/3>.
Bug 1580891 Comment 5 Edit History
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There are two issues here. 1. Features related to scoping are hard for us because the frontend is a mess. It could be hacked in... Seems bad. 2. I heard V8 had a very hard time figuring out exactly what the semantics should be, so ... ideally there would be a clear description of what they did to work from, but I haven't seen that. I guess I could ask devsnek what he thinks of <https://github.com/bmeck/js-repl-goal/issues/3>. (I can't remember where I heard this, sorry.)