How do I do a jQuery blocking AJAX call without async = false?

Question

I have a page which does AJAX validation of an email before continuing on to the next page, using the HTML5 setCustomValidity() method [using the webshims library for older

Answer 1

I assume you will be doing full form validation on submit anyway, so perhaps it's no problem if the as-you-type email validation is interrupted, and precedence given to the form submission.

I think what I'd do is abort the 'validateEmailRegistered' AJAX request when the user submits the form. Then, perform full server-side form validation as usual - including email validation.

My understanding of as-you-type validation is that it's a nicety, not a substitute for validating the form when it is submitted. So it doesn't make sense to me for it to block the form submission.