Test, validate and match regular expressions
Matches Meetup.com event URLs with an optional https:// protocol and www. subdomain, followed by the meetup.com domain, a group name of 5-60 alphanumeric characters or hyphens, the /events/ path segment, and an event identifier with an optional trailing slash. Useful for validating user-submitted event links in forms, filtering or extracting Meetup event URLs from text, and ensuring proper URL structure before redirecting or scraping event pages.