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--- javascript:date_object_to_yyyymmdd [2016/07/07 19:15] – peter
+++ javascript:date_object_to_yyyymmdd [2020/07/15 09:30] (current) – external edit 127.0.0.1
@@ Line 16: / Line 16: @@
 </code>
+or
+To not modify native objects, and to use multiplication which some think is clearer than string padding use:
-This is a single line of code that you can use to create a YYYY-MM-DD string of today's date.
+<code javascript>
+function yyyymmdd(dateIn) {
+   var yyyy = dateIn.getFullYear();
+   var mm = dateIn.getMonth()+1; // getMonth() is zero-based
+   var dd  = dateIn.getDate();
+   return String(10000*yyyy + 100*mm + dd); // Leading zeros for mm and dd
+}
+var today = new Date();
+console.log(yyyymmdd(today));
+</code>
+or
+<code javascript>
+Date.prototype.yyyymmdd = function() {
+  var yyyy = this.getFullYear();
+  var mm = this.getMonth() < 9 ? "0" + (this.getMonth() + 1) : (this.getMonth() + 1); // getMonth() is zero-based
+  var dd  = this.getDate() < 10 ? "0" + this.getDate() : this.getDate();
+  return "".concat(yyyy).concat(mm).concat(dd);
+};
+Date.prototype.yyyymmddhhmm = function() {
+  var yyyy = this.getFullYear();
+  var mm = this.getMonth() < 9 ? "0" + (this.getMonth() + 1) : (this.getMonth() + 1); // getMonth() is zero-based
+  var dd  = this.getDate() < 10 ? "0" + this.getDate() : this.getDate();
+  var hh = this.getHours() < 10 ? "0" + this.getHours() : this.getHours();
+  var min = this.getMinutes() < 10 ? "0" + this.getMinutes() : this.getMinutes();
+  return "".concat(yyyy).concat(mm).concat(dd).concat(hh).concat(min);
+};
+Date.prototype.yyyymmddhhmmss = function() {
+  var yyyy = this.getFullYear();
+  var mm = this.getMonth() < 9 ? "0" + (this.getMonth() + 1) : (this.getMonth() + 1); // getMonth() is zero-based
+  var dd  = this.getDate() < 10 ? "0" + this.getDate() : this.getDate();
+  var hh = this.getHours() < 10 ? "0" + this.getHours() : this.getHours();
+  var min = this.getMinutes() < 10 ? "0" + this.getMinutes() : this.getMinutes();
+  var ss = this.getSeconds() < 10 ? "0" + this.getSeconds() : this.getSeconds();
+  return "".concat(yyyy).concat(mm).concat(dd).concat(hh).concat(min).concat(ss);
+};
+var d = new Date();
+d.yyyymmdd();
+d.yyyymmddhhmm();
+d.yyyymmddhhmmss();
+</code>
+===== Using Date.toISOString() =====
+**WARNING**:  **Date.toISOString()** creates a UTC formatted date and hence can jump date boundaries depending on the timezone. E.g. in GMT+1: (new Date(2013,13, 25)).toISOString() == '2013-12-24T23:00:00.000Z'
+To create a **YYYY-MM-DD** string of today's date:
 <code javascript>
 var d = new Date().toISOString().slice(0,10);
+</code>
+or
+<code javascript>
+var d = new Date();
+var res = d.toISOString().slice(0,10).replace(/-/g,"");
+</code>
+To get **YYYYMMDDHHmmSSsss**use this:
+<code javascript>
+var ds = (new Date()).toISOString().replace(/[^0-9]/g, "");
 </code>