Source: https://hg.mozilla.org/mozilla-central/file/be81b8d6fae9/dom/html/HTMLInputElement.cpp
Email validator used in Gecko/Firefox for <input type="email">
Derived from a manual parser.
Firefox converts UTF-8 to punycode first - the other browsers do not.
Firefox also checks the total length and the length of domain labels. Neither of these are enforced with this pattern.
| Text | Result |
|---|---|
account@example.com
| match |
| @example.com | no match |
| account@ | no match |
account@example
| match |
| example.com | no match |