Question

In this example I try to validate for a city name. It works if I enter San Louis Obispo but not if I enter Boulder Creek or Boulder. I thought ? was supposed to make a block optional.

    if (!/^[a-zA-Z'-]+\s[a-zA-Z'-]*\s([a-zA-Z']*)?$/.test(field)){
        return "Enter City only a-z A-Z .\' allowed and not over 20 characters.\n";
        }

Answer 1

I think spaces are the problem (\s). You made second and third words optional (by using * instead of +), but not the spaces. Question mark is only being applied to the third word because of parentheses.