WeakSet.prototype.delete
The delete() method removes the specified element from a
WeakSet object.
Syntax
delete(value)
Parameters
value- : Required. The object remove from the
WeakSetobject.
- : Required. The object remove from the
Return value
true if an element in the WeakSet object has been removed
successfully. false if the value is not found in
the WeakSet or if the value is not an object.