Now, we understand the fundamental meaning of weak in the term WeakMap or WeakSet. It is not very complex to predict how sets work and how WeakSet differs from them. Let's take a quick look at the functional difference and then move on to the API.
WeakSet is very similar to WeakMap; the values that a WeakSet can hold are only objects and cannot be primitives just like in the case of a WeakMap. The WeakSets are also not enumerable, so you do not have direct access to the values available inside the set.
Let's create a small example and understand the difference between a Set and a WeakSet:
var set = new Set();
var wset = new WeakSet();
(function() {
var a = {a: 1};
var b = {b: 2};
var c = {c: 3};
var d = {d: 4};
set.add(1).add(2).add(3).add(4);
wset.add(a).add(b).add(b).add(d);
})();
console.dir(set);
console.dir(wset);One important thing to note is that WeakSet does not accept primitives and can only accept objects similar to the...