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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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[-] 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

[-] ulterno@programming.dev 0 points 12 hours ago

I have a feeling, the ones codapine is stating, didn't even care to half-read the spec and just went with what they knew from experience.
Maybe they didn't even know there was a spec.
Maybe they asked ChatGPT for the regex.

[-] bignose@programming.dev 1 points 17 hours ago* (last edited 17 hours ago)

The spec is so complex that it’s not even possible to know which regex to use

Yes. Almost like a regex is not the correct tool to use, and instead they should use a well-tested library function to validate email addresses.

[-] notarobot@lemmy.zip 1 points 11 hours ago* (last edited 11 hours ago)

Exactly! But its not obvios. So most of those shitty websites don't even know they have a problem.

Then there are also people ignoring it on purpose. I once read a reddit comment saying 'well of your address looks like "John wick 🐶❤️"@2001:0db8:85a3:0000:0000:8a2e:0370:7334 I don't event want your email in my DB because oit will break something

[-] 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])+)\\])