The union() method of Set instances takes a set and returns a new set containing elements which are in either or both of this set and the given set.| MDN Web Docs
There are various communication channels that the community can use to contact MDN Web Docs staff and participate in discussions.| MDN Web Docs
This guide introduces you to rate limits and slow down mechanisms. Learn how to apply slow down and rate limit mechanisms in Express applications.| MDN Web Docs
The Set object lets you store unique values of any type, whether primitive values or object references.| MDN Web Docs