Set (initial support)Set objects store unique values of any type.setsSetswidely2015-07-292018-01-29https://tc39.es/ecma262/multipage/keyed-collections.html#sec-set-objectshttps://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Setjavascript.builtins.Setjavascript.builtins.Set.@@iteratorjavascript.builtins.Set.@@speciesjavascript.builtins.Set.Setjavascript.builtins.Set.Set.iterable_allowedjavascript.builtins.Set.Set.null_allowedjavascript.builtins.Set.addjavascript.builtins.Set.clearjavascript.builtins.Set.deletejavascript.builtins.Set.entriesjavascript.builtins.Set.forEachjavascript.builtins.Set.hasjavascript.builtins.Set.key_equality_for_zerosjavascript.builtins.Set.keysjavascript.builtins.Set.sizejavascript.builtins.Set.valueshttps://nowyoucanuse.com/features--set.html