I think one mistake of JavaScript was to hide the __proto__ property on objects. (In some implementations it is exposed, but it is not part of the standard.) Th

I think one mistake of JavaScript was to hide the __proto__ property on objects. (In some implementations it is exposed, but it is not part of the standard.) This makes the concept of inheritance somewhat opaque, and makes it hard to e.g. forward calls to an overridden method.