Use regex, they said. It's better, they said.

Found this on Facebook.

I've seen a much longer one. Emails in regex are crazy if you want to cover all possibilities.

@jirehstudios I use one in one of my projects... a year and change in and it's still getting tweaked

Today regex for anything but a rough check for a @ and a . is dead.

Before international domain names a standards compliant regex was around 4K chars long.

With international I dont think it is possible. How does regex handle chineese?

There are so many options that even dedicated libraries fails pn edge cases.

Inactually dont know of a library that manages all of our testcases. But we have one that handles all but a few.

Just send a damn message to verify/activate... It's them who should make sure it's entered correctly.

You versus the guy she told you not to worry about

I don't really get the point of such complicated checks.

Is it to just confirm the email was written correctly and want to avoid asking the user to enter it twice?

@Letmecode only way to stay current.

Any other will probably be out of date once you get it in production ;)

What do you mean you found it on facebook. Do you go there when you have questions?

Checking for a valid email like that is pretty useless Imo. There is no definitive way to be 100% sure so sending an actual email is your best option

Read David Gilbertson's two-part email verification post/rant on Medium, he expailns quite well, why most email verif regexes catch only a very very small fraction of valid, but incorrect addresses

@rusty-hacker Someone was sharing this on a front end developer group.

What's the difference between checkEmailAdressForValidity and isValidEmailAdress?