Javascript is not a strictly object oriented language. However Mystique gives the Base object class like behavior. To subclass Base, pass the extend function and object to be mixed into the Base prototype.

define([
    'mystique/Base',
    'mystique/Result'
],
function(
    Base,
    Result
){
    // module:
    //		mystique/Alpha

    return Base.extend({

        regex: /^[a-zA-Z]+$/,

        _isValid: function(value){

            var result = new Result({value: true});

            if ( ! this.regex.test(value)){
                result.set('value', false);
                result.addMessage('alpha');
            }

            return result;
        }
    });
});

Javascript is not a strictly object oriented language. However Mystique gives the Base object class like behavior. To subclass Base, pass the extend function and object to be mixed into the Base prototype.

var Alpha = mystique.Base.extend({

    regex: /^[a-zA-Z]+$/,

    _isValid: function(value){

        var result = new mystique.Result({value: true});

        if ( ! this.regex.test(value)){
            result.set('value', false);
            result.addMessage('alpha');
        }

        return result;
    }
});

namespace Zoop\Mystique;

class Alpha extends Base
{

    protected $regex = '/^[a-zA-Z]+$/';

    protected function _isValid($value){

        $result = new Result(["value" => true]);

        if ( ! preg_match($this->regex, $value)){
            $result->setValue(false);
            $result->addMessage('alpha');
        }

        return $result;
    }
}