JavaScript: Set.prototype.size
New in JS2015.
set_obj.size- Return the total count of values in set_obj.
console.log( (new Set([4, 5, 6])).size === 3);
size is a getter property.
[see Getter/Setter Properties]
New in JS2015.
set_obj.sizeconsole.log( (new Set([4, 5, 6])).size === 3);
size is a getter property.
[see Getter/Setter Properties]