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--- javascript:date_format [2016/07/07 20:28] – peter
+++ javascript:date_format [2020/07/15 09:30] (current) – external edit 127.0.0.1
@@ Line 116: / Line 116: @@
+===== Library =====
+See http://blog.stevenlevithan.com/archives/date-time-format
+<code javascript>
+/*
+ * Date Format 1.2.3
+ * (c) 2007-2009 Steven Levithan <stevenlevithan.com>
+ * MIT license
+ *
+ * Includes enhancements by Scott Trenda <scott.trenda.net>
+ * and Kris Kowal <cixar.com/~kris.kowal/>
+ *
+ * Accepts a date, a mask, or a date and a mask.
+ * Returns a formatted version of the given date.
+ * The date defaults to the current date/time.
+ * The mask defaults to dateFormat.masks.default.
+ */
+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) {
+              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);
+};
+</code>
+Note that the day and month names can be changed (for internationalization or other purposes) by updating the **dateFormat.i18n** object.