That works in Python, because Python has a distinction between an "instance" object, and, say, a Dict. In JavaScript an object is an object is an object -- under your proposed change, what would be the value of "this, in this:

    Klass.prototype.method = options.method;

> That works in Python, because Python has a distinction between an "instance" object, and, say, a Dict.

Not really, it's trivial to create a dict-like object which allows access to keys as properties, just override `__getattr__`.

> In JavaScript an object is an object is an object

No, objects can have a non-null [[prototype]] indicating it was created from using `new` on a constructor.

> Klass.prototype.method = options.method;

Depends what `options` is.