Nodejs Date Format formatDay(pattern, dayNames = [], monthnames = [])

Method Source Code

Date.prototype.formatDay = function (pattern, dayNames = [], monthnames = []) {
    pattern = pattern.replace(/dddd/g, dayNames[this.getDay()]);
    pattern = pattern.replace(/dd/g, this.getDate().toString().padLeft(2, 0));
    pattern = pattern.replace(/mmm/g, monthnames[this.getMonth()]);
    pattern = pattern.replace(/mm/g, (this.getMonth() + 1).toString().padLeft(2, 0));
    pattern = pattern.replace(/yyyy/g, this.getFullYear().toString());
    pattern = pattern.replace(/yy/g, this.getFullYear().toString().substr(2, 2));
    return pattern;
};

Related

1. formatDate(date)

   function formatDate(date) {
     if(date instanceof Date === false) {
       return console.log("err");
     var year = date.getFullYear();
     var month = pad(date.getMonth() + 1);
     var day = pad(date.getDate());
     return [year, month, day].join('-');
   

2. formatDate(date)

   function formatDate(date){
     return date.split('-').reverse().join('/');
   

3. formatDate(format)

   Date.prototype.formatDate = function(format) {
     var date = this,
       day = date.getDate(),
       month = date.getMonth() + 1,
       year = date.getFullYear(),
       hours = date.getHours(),
       minutes = date.getMinutes(),
       seconds = date.getSeconds();
     if (!format) {
   ...
   

4. formatDate(format)

   Date.prototype.formatDate = function (format) {
       var date = this,
           day = date.getDate(),
           month = date.getMonth() + 1,
           year = date.getFullYear(),
           hours = date.getHours(),
           minutes = date.getMinutes(),
           seconds = date.getSeconds();
       if (!format) {
   ...
   

5. formatDate(format)

   Date.prototype.formatDate = function(format) {
     var months = new Array("Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec");
     var yyyy = this.getFullYear();
     var yy = yyyy.toString().substring(2);
     var m = this.getMonth() + 1;
     var mm = m < 10 ? "0" + m : m;
     var mmm = months[m - 1];
     var d = this.getDate();
     var dd = d < 10 ? "0" + d : d;
   ...
   

6. formatMMDD()

   Date.prototype.formatMMDD = function () {
      return this.getMonth() + 1 + '/' + this.getDate();
   };
   

7. formatMMDDYYYY()

   Date.prototype.formatMMDDYYYY = function () {
      return this.getMonth() + 1 + '/' + this.getDate() + '/' + this.getFullYear();
   };
   

8. formatStr()

   Date.prototype.formatStr=function(){
       function convert2fixed(str){
           var _num=Number(str);
           if(!isNaN(str)){
               if(_num<10){
                   return '0'+_num;
               }else
               return _num;
   ...
   

9. formatTime(date)

   function formatTime(date) {
     if(date instanceof Date === false) {
       return console.log('err');
     var hour = pad(date.getHours());
     var minute = pad(date.getMinutes());
     return [hour, minute].join(':');