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I'm making an html5 form and only want users to sign up with .edu or .gov email addresses. What would the regex look like for that? I know it must be checked serverside as well, but one step at a time.

Example: 

<input type="email" pattern="[a-z0-9._%+-]+@[a-z0-9.-]+\.[a-z]{2,4}$" />
VLAZ
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badcarbine
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2 Answers2

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Building on How to validate an email address in JavaScript? I came up with this using a simplified RFC 2822 compatible pattern:

[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@((?!-)[A-Za-z0-9-]{0,62}[A-Za-z0-9]\.)+(edu|gov)

Regex Demo

The major difference is how the domain part is evaluated. I took this from my previous answer.

<form action="javascript:console.log('ok')">
<input type="text" name="domain" 
pattern="[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@((?!-)[A-Za-z0-9-]{0,62}[A-Za-z0-9]\.)+(edu|gov)" title="Sorry, only email addresses from .edu and .org domains are allowed.">
<input type="submit">
</form>
wp78de
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Add this: 

^[a-zA-Z0-9_.+-]+@(?:(?:[a-zA-Z0-9-]+\.)?[a-zA-Z]+\.)?(domain|domain2)\.(edu|gov)$

Demo

Nisarg
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