Return False not working inside jQuery.ajax

Question

P.S.: Read \"EDITED on 2019-06-29\":

I have a webform for updating user information, and when he updates his email a verification is performed via

Answer 1

You should not use .submit() on this situation, use a flag system instead, .submit() should only be used for

elements.

var email = jQuery('#email').val();
var flag = 0;
jQuery.ajax({
    type : 'GET',
    url : '/ajax/verify-email.php?email=' + email,
    async: false,
    success : function( d ) {
        if( d == '1' ) {
            alert('Another user is using this email');
            jQuery('input[name="email"]').focus();
            flag = 1;
        }
    }
});
if(flag == 1) return false;