Email input internationalization

[sayrer]

What is the issue with the HTML Standard?

Hi, I was checking this. I've opened up a repo that checks the behavior of Chrome, WebKit, and Firefox. None of them do the same thing.

https://github.com/sayrer/email-element-tests

[annevk]

That seems potentially useful for #4562 and #10522. cc @aphillips @hsivonen

[sayrer]

It seems like none of those browsers allow non-ASCII local parts. For the domain:

• WebKit: no non-ASCII domains
• Chrome: allows non-ASCII domains, but converts them to punycode (a-label)
• Firefox: allows non-ASCII domains, and leaves them unconverted (not in punycode)