Nodejs Date ISO Format getISOYear()

Method Source Code

Date.prototype.getISOYear = function () {
   var target   = new Date(this.valueOf());
   target.setDate(target.getDate() - ((this.getDay() + 6) % 7) + 3);

   return target.getFullYear();
}

Related

1. getISO8601()

   Date.prototype.getISO8601 = function () {
     var month = (this.getMonth() + 1 < 10) ? "0" + this.getMonth() + 1 : this.getMonth() + 1;
     var day = (this.getDate() < 10) ? "0" + this.getDate() : this.getDate();
     var hours = (this.getHours() < 10) ? "0" + this.getHours() : this.getHours();
     var minutes = (this.getMinutes() < 10) ? "0" + this.getMinutes() : this.getMinutes();
     var seconds = (this.getSeconds() < 10) ? "0" + this.getSeconds() : this.getSeconds();
     var offset = this.getTimezoneOffset() / 60;
     return this.getFullYear() + "-" + month + "-" + day + "T" + hours + ":" + minutes + ":" + seconds + "-0" + offset + "00";
   };
   ...
   

2. getISODate()

   Date.prototype.getISODate = function()
     var mth = this.getMonth() + 1;
     mth = (mth < 10 ? '0' : '') + mth;
     var date = this.getDate();
     date = (date < 10 ? '0' : '') + date;
     return this.getFullYear() + mth + date;
   };
   

3. getISODate()

   Date.prototype.getISODate = function () {
     let month = this.getMonth() + 1;
     if (month < 10) month = '0' + month;
     let day = this.getDate();
     if (day < 10) day = '0' + day;
     return this.getFullYear() + '-' + month + '-' + day;
   };
   

4. getISODay()

   Date.prototype.getISODay = function(){
       return (this.getDay() + 6) % 7;
   

5. getISOWeek()

   Date.prototype.getISOWeek = function () {
     var target = new Date(this.valueOf());
     var dayNr = (this.getDay() + 6) % 7;
     target.setDate(target.getDate() - dayNr + 3);
     var firstThursday = target.valueOf();
     target.setMonth(0, 1);
     if (target.getDay() != 4) {
       target.setMonth(0, 1 + ((4 - target.getDay()) + 7) % 7);
     return 1 + Math.ceil((firstThursday - target) / 604800000);
   

6. iso8601()

   Date.prototype.iso8601 = function () {
       return this.getUTCFullYear() + '-' +
           (this.getUTCMonth() + 1).zfill(2) + '-' +
           this.getUTCDate().zfill(2) + 'T' +
           this.getUTCHours().zfill(2) + ':' +
           this.getUTCMinutes().zfill(2) + ':' +
           this.getUTCSeconds().zfill(2) + '.' +
           this.getUTCMilliseconds().zfill(3);
   };
   ...
   

7. isoDate()

   Date.prototype.isoDate = function() {
     return this.getFullYear() + "-" + (parseInt(this.getMonth())+1) + "-" + this.getDate();
   

8. isoDate()

   Date.prototype.isoDate = function(){
     var d = this;
     return d.year();
   function toJSArray(arr) {
     var len = [arr count],
         res = [];
     while(len--){
       res.push(arr[len]);
   ...
   

9. rfc3339()

   function f(n) {
       return n < 10 ? '0' + n : n;
   Date.prototype.rfc3339 = function() {
       return this.getUTCFullYear()   + '-' +
            f(this.getUTCMonth() + 1) + '-' +
            f(this.getUTCDate())      + 'T' +
            f(this.getUTCHours())     + ':' +
            f(this.getUTCMinutes())   + ':' +
   ...