show html5 validation callout popup manually

Question

I want to show html5 validation callout popup manually. I want to check if user enters wrong string pattern in text box then want to show validation callout same as we get by default in html5 when use flag required="required" in text box.

Answer 1

Have you tried the new functions of the form-element in html5?

You can find them at the bottom of this mdn page:

https://developer.mozilla.org/en/HTML/Forms_in_HTML