WeakSetA WeakSet object stores unique values of any type without creating strong references to the values, such that membership in the set does not prevent garbage collection of the value.collectionsCollectionswidely2015-09-302018-03-30https://tc39.es/ecma262/multipage/keyed-collections.html#sec-weakset-objectshttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WeakSetjavascript.builtins.WeakSetjavascript.builtins.WeakSet.WeakSetjavascript.builtins.WeakSet.WeakSet.iterable_allowedjavascript.builtins.WeakSet.WeakSet.null_allowedjavascript.builtins.WeakSet.addjavascript.builtins.WeakSet.deletejavascript.builtins.WeakSet.hasjavascript.builtins.WeakSet.symbol_as_keyshttps://nowyoucanuse.com/features--weakset.html