<p>Is there any way in JavaScript to create a &quot;weak reference&quot; to another object? <a href="http://en.wikipedia.org/wiki/Weak_reference" rel="nofollow noreferrer">Here is the wiki page describing what a weak reference is.</a> <a href="https://community.oracle.com/blogs/enicholas/2006/05/04/understanding-weak-references" rel="nofollow noreferrer">Here is another article that describes them in Java.</a> Can anyone think of a way to implement this behavior in JavaScript?</p>

http://www.jibbering.com/faq/faq_notes/closures.html
ECMAScript uses automatic garbage collection. The specification does not define the details, leaving that to the implementers to sort out, and some implementations are known to give a very low priority to their garbage collection operations. But the general idea is that if an object becomes un-referable (by having no remaining references to it left accessible to executing code) it becomes available for garbage collection and will at some future point be destroyed and any resources it is consuming freed and returned to the system for re-use.
This would normally be the case upon exiting an execution context. The scope chain structure, the Activation/Variable object and any objects created within the execution context, including function objects, would no longer be accessible and so would become available for garbage collection.
Meaning there are no weak ones only ones that no longer become available.