RegEx email /^((?!\.)[\w-_.]*)(@\w+)(\.\w+(\.\w+)?)$/gim; Just playing with Reg Ex. This to validate emails in following ways ...

Simply searches for the thread-id in any kind of valid reddit-URL.

This regex should extract the subdomain, if any, or the domain, if no subdomain is used, from an arbitrary URL

extract video id, index, play list id from youtube url

This regex prevents the writing of non-standard conventional commits. I'm available on my github

This regex matches only when all the following are true: password must contain 1 number (0-9) password must contain 1 uppercase letters password must contain 1 lowercase letters password must contain 1 non-alpha numeric number...

Pattern matching and extracting color code formats using RegEx. https://github.com/Kyza/color-regex/