Can this 7one be extracted from x?
Nope. fshould explicitly tell you the way to get this(e.g. function f() { return this; }). Since this is not so, you cannot.
, [[BoundThis]] . [[BoundThis]] : , [[Call]] . , , .
g x. g?
.:-) API.
lexical environment, g, . .
, , ( ), TC39 (, ) ( ).