The WeakSet object lets you store weakly held objects in a collection.
Documentation WeakSet by Mozilla Contributors, licensed under CC-BY-SA 2.5.
Static variables
staticfinalread onlylength:Int
The value of the length property is 0.
Constructor
If an iterable object is passed, all of its elements will be added to the new WeakSet.
null is treated as undefined.
Methods
Appends a new object with the given value to the WeakSet object.
Removes the element associated to the value.
has(value) will return false afterwards.
Returns a boolean asserting whether an element is present with the given value
in the WeakSet object or not.