Non-existent attributes still match in a rule head specializer in Node.JS library about oso HOT 3 CLOSED

> x = {b: undefined}
{ b: undefined }
> x.hasOwnProperty("b")
true
> x.hasOwnProperty("b")
true
> x.b
undefined
> x.hasOwnProperty("foo")
false
> x.foo
undefined

from oso.

Is there a distinction in Node between a non-existent attribute and one which is undefined?

e.g.

d = { a: 1 }
d.b
// returns undefined

vs

d = { a: 1, b: undefined }
d.b
// also returns undefined

from oso.

Should be doing a similar check like this: https://github.com/osohq/oso/blob/main/languages/python/oso/polar/query.py#L98

from oso.