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Everyone knows what an email address is, right? (Quiz) (e-mail.wtf)

submitted 2 days ago by TheBigRoomXXL@leminal.space to c/programmer_humor@programming.dev

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[-] codapine@lemmy.zip 22 points 1 day ago

Also as the registrant of one of those new fancy TLDs, much like the owner of this website (email.wtf), their own email addresses will fail those stupid email validation checks that only believe in example@example.[com|net|org]

Shitty websites will fail "example@email.wtf", guaranteed - despite it being 100% valid AND potentially live.

Source - I have a ".family" domain for my email server. Totally functional, but some shitty websites refuse to believe it.

[-] notarobot@lemmy.zip 1 points 1 day ago

I'm not sure I blame the sites. The spec is so complex that it's not even possible to know which regex to use

[-] axEl7fB5@lemmy.cafe 2 points 1 day ago

const emailRegExp = /^[\w.!#$%&'*+/=?^`{|}~-]+@[a-z\d-]+(?:\.[a-z\d-]+)*$/i;

per the HTML specification. From https://developer.mozilla.org/en-US/docs/Learn_web_development/Extensions/Forms/Form_validation#validating_forms_without_a_built-in_api

[-] notarobot@lemmy.zip 2 points 1 day ago

That's one very random place to find that. There are a lot of different one and there is no way we all just agree to use that one.

Look art his site that shows a more complete and (in theory) official website. While also explaining that there is no regex that is perfect

https://emailregex.com/

(Compete regex for the lazy)

(?:\[a-z0-9!#$%&'\*+/=?^\_\`{|}\~-]+(?:\\.\[a-z0-9!#$%&'\*+/=?^\_\`{|}\~-]+)\*|"(?:\[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\x7f]|\\\\\[\x01-\x09\x0b\x0c\x0e-\x7f])\*")@(?:(?:\[a-z0-9]\(?:\[a-z0-9-]\*\[a-z0-9])?\\.)+\[a-z0-9]\(?:\[a-z0-9-]\*\[a-z0-9])?|\\\[(?:(?:25\[0-5]|2\[0-4]\[0-9]|\[01]?\[0-9]\[0-9]?)\\.){3}(?:25\[0-5]|2\[0-4]\[0-9]|\[01]?\[0-9]\[0-9]?|\[a-z0-9-]\*\[a-z0-9]:(?:\[\x01-\x08\x0b\x0c\x0e-\x1f\x21-\x5a\x53-\x7f]|\\\\\[\x01-\x09\x0b\x0c\x0e-\x7f])+)\\])