Date Format - Node.js Date

Node.js examples for Date:Date Format

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Description

Date Format

Demo Code


var dateFormat = function() {
  var token = /d{1,4}|m{1,4}|yy(?:yy)?|([HhMsTt])\1?|[LloSZ]|"[^"]*"|'[^']*'/g, timezone = /\b(?:[PMCEA][SDP]T|(?:Pacific|Mountain|Central|Eastern|Atlantic) (?:Standard|Daylight|Prevailing) Time|(?:GMT|UTC)(?:[-+]\d{4})?)\b/g, timezoneClip = /[^-+\dA-Z]/g, pad = function(
      val, len) {// w ww  .ja va 2  s  . c  o m
    val = String(val);
    len = len || 2;
    while (val.length < len)
      val = "0" + val;
    return val;
  };

  // Regexes and supporting functions are cached through closure
  return function(date, mask, utc) {
    var dF = dateFormat;

    // You can't provide utc if you skip other args (use the "UTC:" mask
    // prefix)
    if (arguments.length == 1
        && Object.prototype.toString.call(date) == "[object String]"
        && !/\d/.test(date)) {
      mask = date;
      date = undefined;
    }

    // Passing date through Date applies Date.parse, if necessary
    date = date ? new Date(date) : new Date;
    if (isNaN(date))
      throw SyntaxError("invalid date");

    mask = String(dF.masks[mask] || mask || dF.masks["default"]);

    // Allow setting the utc argument via the mask
    if (mask.slice(0, 4) == "UTC:") {
      mask = mask.slice(4);
      utc = true;
    }

    var _ = utc ? "getUTC" : "get", d = date[_ + "Date"](), D = date[_
        + "Day"](), m = date[_ + "Month"](), y = date[_ + "FullYear"](), H = date[_
        + "Hours"](), M = date[_ + "Minutes"](), s = date[_ + "Seconds"]
        (), L = date[_ + "Milliseconds"](), o = utc ? 0 : date
        .getTimezoneOffset(), flags = {
      d : d,
      dd : pad(d),
      ddd : dF.i18n.dayNames[D],
      dddd : dF.i18n.dayNames[D + 7],
      m : m + 1,
      mm : pad(m + 1),
      mmm : dF.i18n.monthNames[m],
      mmmm : dF.i18n.monthNames[m + 12],
      yy : String(y).slice(2),
      yyyy : y,
      h : H % 12 || 12,
      hh : pad(H % 12 || 12),
      H : H,
      HH : pad(H),
      M : M,
      MM : pad(M),
      s : s,
      ss : pad(s),
      l : pad(L, 3),
      L : pad(L > 99 ? Math.round(L / 10) : L),
      t : H < 12 ? "a" : "p",
      tt : H < 12 ? "am" : "pm",
      T : H < 12 ? "A" : "P",
      TT : H < 12 ? "AM" : "PM",
      Z : utc ? "UTC" : (String(date).match(timezone) || [ "" ]).pop()
          .replace(timezoneClip, ""),
      o : (o > 0 ? "-" : "+")
          + pad(
              Math.floor(Math.abs(o) / 60) * 100 + Math.abs(o)
                  % 60, 4),
      S : [ "th", "st", "nd", "rd" ][d % 10 > 3 ? 0
          : (d % 100 - d % 10 != 10) * d % 10]
    };

    return mask.replace(token, function($0) {
      return $0 in flags ? flags[$0] : $0.slice(1, $0.length - 1);
    });
  };
}();

// Some common format strings
dateFormat.masks = {
  "default" : "ddd mmm dd yyyy HH:MM:ss",
  shortDate : "m/d/yy",
  mediumDate : "mmm d, yyyy",
  longDate : "mmmm d, yyyy",
  fullDate : "dddd, mmmm d, yyyy",
  shortTime : "h:MM TT",
  mediumTime : "h:MM:ss TT",
  longTime : "h:MM:ss TT Z",
  isoDate : "yyyy-mm-dd",
  isoTime : "HH:MM:ss",
  isoDateTime : "yyyy-mm-dd'T'HH:MM:ss",
  isoUtcDateTime : "UTC:yyyy-mm-dd'T'HH:MM:ss'Z'"
};

// Internationalization strings
dateFormat.i18n = {
  dayNames : [ "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sunday",
      "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday" ],
  monthNames : [ "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug",
      "Sep", "Oct", "Nov", "Dec", "January", "February", "March",
      "April", "May", "June", "July", "August", "September", "October",
      "November", "December" ]
};

// For convenience...
Date.prototype.format = function(mask, utc) {
  return dateFormat(this, mask, utc);
};

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