Answer 1

This is just part of code, and it depend of lot of stuff, and also this line is completely valid javascript code, already converted

But full code should look, atleast structure something like this:

https://code.sololearn.com/Whd7SmFUMRqv/?ref=app

Answer 2

Javascript run on browser not directly on pc, I never heard about memory address in js.
maybe there are something for node.js I don't know much

Many asked same question on stackoverflow and got answer that it is not possible, but there some alternative ways what kinda works, maybe this can help you
https://stackoverflow.com/questions/72878230/any-way-to-get-javascript-variable-memory-address

https://stackoverflow.com/questions/639514/how-can-i-get-the-memory-address-of-a-javascript-variable/639535

https://stackoverflow.com/questions/50530936/is-there-any-method-to-check-memory-address-of-javascript-variable