How to track a string-variable in JavaScript -

requirement : able track string variables in javascript assigning unique id each variable.

example:

var = 'alkd'; var b = 'iquwq';   console.log(a.id); # 1234 console.log(b.id); # 5678 

what have tried : have tried extending string object adding new method or property 'string.prototype'

output :

console.log(a.id); #1234 console.log(b.id); #1234 (returning same id above) 

what have observed : ever instance of string inherited string.prototype. changes string.prototype object propagated string instances.

example :

a.id = 8783; # setter console.log(b.id)# returns 8783 

my questions :

1. is possible required functionality extending string object?
2. is there alternative way this?
3. are there plans add functionality future editions of ecmascript?

maybe don't understand trying do, if want assign id variable , have value variable along getters , setters, can use json object

// initialize var = {id: 0, value: "zero"};  // console.log(a.id); console.log(a.value);  // set a.id = 1; a.value = "one";  // console.log(a.id); console.log(a.value);