Hi Logan, > So we're all on the same page, this restriction exists because it > means `class` syntax can extend builtin types like `Map`, `Set`, > Array` and `Error` and such, which cannot be extended (with > correct functionality anyway) in standard ES5
That makes sense for built-ins, but is there some reason this enforcement cannot be applied for those constructors (perhaps *by* them) and not *all* constructors? (btw - thanks for explaining the point of this - I was not aware of that) Best, Don -- Don Griffin Director of Engineering Sencha, Inc. https://www.sencha.com/
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