George Kalpakas 3c2770bfc7 docs(forms): expand e-mail validation description (#32961)
Previously, there was no documentation of what `Validators.email()`
expects as a valid e-mail address, making it difficult for people to
determine whether it covers their requirements or not. Even more so that
the used pattern slightly deviates from the
[WHATWG version](https://html.spec.whatwg.org/multipage/input.html#valid-e-mail-address).
One's only option was to look at the source code and try to decipher the
regexp pattern.

This commit adds a high-level description of the validator and mentions
its similarity to and differences from the WHATWG version. It also adds
a brief explanation of the regexp's behavior and references for more
information in the source code to provide more context to
maintainers/users trying to understand the implementation in the future.

Fixes #18985
Fixes #25186
Closes #32747

PR Close #32961
2019-10-07 10:51:00 -07:00
2019-01-11 11:15:59 -08:00
2019-10-01 14:56:45 -07:00

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