Javascript DateFormat for different timezones

Question

I\'m a Java developer and I\'m used to the SimpleDateFormat class that allows me to format any date to any format by settings a timezone.

Date date = new Dat         


        

Answer 1

If you're just passing the raw TZ there's nothing really complicated about adjusting the hours. My example below is of course abbreviated. Yours may get quite long depending on how many patterns you'd handle.

Date.prototype.format = function(format, tzAdjust) {
    // adjust timezone
    this.setHours(this.getHours()+tzAdjust)
    // pad zero helper - return "09" or "12"
    var two = function(s){ return s+"".length==1 ? "0"+s : s+""; }
    // replace patterns with date numbers
    return format.replace(/dd|MM|yyyy|hh|mm|ss/g, function(pattern){
        switch(pattern){
            case "d" : return this.getDate();
            case "dd" : return two(this.getDate());
        }
    });
}