Question

In this plugin:

http://dansnetwork.com/2010/03/27/content-expirator-jquery-content-expiration-plugin/

He is comparing the expire date d to the current date today, but I don’t understand how today knows what today’s date is just from new Date():

(function($){
$.contentExpirator = function(prfx){
    var pfix = prfx || 'exp';
    $("[class|="+pfix+"]").each(function(){
        var eString = $(this).attr('class').split(' ')[0];
        var dString = eString.split('-');
        var d = new Date(dString[1],dString[2].toString()-1,dString[3]);
        var today = new Date();
        if(d < today){
            $(this).css('display','none');
        }
    });
}
})(jQuery);

The code works fine, I’m just asking out of curiosity for the future.

Answer 1

The default value for new Date() is the current date. From the MDC docs:

If you supply no arguments, the constructor creates a Date object for today’s date and time according to local time.