validation allow emails without a dot?

I'm writing a very simple mock-up to demonstrate some HTML5 form-validation. However, I noticed the email validation doesn't check for a dot in the address, nor does it check for characters following said dot.

In other words, "john@doe" is considered valid, when it's clearly not a valid email address; "doe" isn't a domain.

This is how I'm coding my email field:

<input type="email" required />

Is that not enough?

Check this fiddle to see what I mean.

Note: I know how to accomplish this via a RegEx pattern instead. I'm just wondering how someone could get away with using the email type instead.

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Because a@b is a valid email address (eg localhost is a valid domain). See http://en.wikipedia.org/wiki/Email_address#Examples

Also, keep in mind that you should always do the input validation in server. The client side validation should be only for giving feedback to the user and not be relied on, since it can be easily bypassed.

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You can theoretically have an address without a "." in.

Since technically things such as:

user@com
user@localserver
user@[IPv6:2001:db8::1]

Are all valid emails.

So the standard HTML5 validation allows for all valid E-mails, including the uncommon ones.

For some easy to read explanations (Instead of reading through the standards): http://en.wikipedia.org/wiki/Email_address#Examples

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Try adding this to the input

pattern="[a-z0-9._%+-]+@[a-z0-9.-]+.[a-z]{2,63}$"

Fiddle

链接地址: http://www.djcxy.com/p/16588.html

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