验证Magento表单输入

Question

My validation code outputs a error message only if something is written into the field. How can I also return the error message when the input field is left empty?

['validate-firstname', 'Please enter your firstname', function (v) {
            return Validation.get('IsEmpty').test(v) ||  /^[a-zA-Z]+$/.test(v)
        }],

Answer 1

If it's an input field then you would just add the class required-entry to it.

As you can see in js/prototype/validation.js where the validation is declared (it's all based on Andrew Tetlaw's work here -> https://github.com/atetlaw/Really-Easy-Field-Validation )

['required-firstname', 'Please enter your first name.', function(v) {
            return !Validation.get('IsEmpty').test(v);
        }],