Reinstate cloned object in JavaScript -

i store initial state of "this" (global) scope shown in pseudo code below :

<script> var copiedobject = object.create(this); x="foo"; console.log(x); // foo </script> 

and reset state later on using :

<script> = object.create(copiedobject); console.log(x); // undefined since it's copy before x assigned </script> 

is correct way of cloning , using clone replace original later on ? instead of "refreshing" page of html5/javascript app , purge newly added functions ajax.

in code have posted, making shallow copy of object. properties of o1 copied reference o2, if these complex types (objects). means:

 var o1 = { a: { b: 1 } },      o2 = object.create(o1);  o1.a.b = 10; console.log(o2.a.b) // 10 

what need deep copy (so), might see, lead down deep rabbit hole.