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Discussion on: JS: Check if an email is valid

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Replies for: It's probably worth sharing this StackOverflow link: How to validate an email in Javascript The specific answer linked suggests: (?:[a-z0-9!#$%...

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mellen profile image
Matt Ellen-Tsivintzeli •

It doesn't completely comply to the RFC, as the RFC allows for comments and the regex does not. As one would expect with a regex.

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andrewbridge profile image
Andrew Bridge •

Haha, so even with 321 characters of regex it's not entirely complete.

To be clear, I'm only making the assumption that <input type="email" /> will validate perfectly to the RFC. But I'd rather leave it to a natively supplied tag than write my own either way.

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mellen profile image
Matt Ellen-Tsivintzeli • • Edited

I agree. The tag is tested by millions of people, everyday, so if there were errors they would pop up.

On the other hand, I don't see the utility of comments in email addresses. 



matt (this is a comment 
(with a nested comment) 
which is patently useless)  .ellen@example.com
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andrewbridge profile image
Andrew Bridge •

Someone, somewhere makes heavy use of comments in email addresses I bet. That one person would be positively peeved if we broke their workflow 😆