Do any browsers yet support HTML5's checkValidity() method?

Question

The HTML5 spec defines some very interesting validation components, including pattern (for validating against a Regexp) and required (for marking a field as required

Answer 1

Opera 10 has some HTML5 form validation http://dev.opera.com/articles/view/improve-your-forms-using-html5/. But, I don't think it has checkValidation().