debugging-games: spot-the-dot

gistfile1.js

// ruining debugging-games: spot-the-dot
$.fn.hasClass = (function(orig){
    return function(className) {
        if (typeof className !== 'string') {
            throw new Error("jQuery.hasClass() expects a string!");
        } else if (className.slice(0, 1) === '.') {
            throw new Error("jQuery.hasClass() does not expect a . prefixing the className");
        }
        
        return orig.apply(this, arguments);
    };
})($.fn.hasClass);