Nodejs Date Format format(pattern, gmt)

Method Source Code

Date.prototype.format = function(pattern, gmt) {
   var result = '';
   var date = this;
   if(gmt != undefined) {
      var utc = date.getTime() + (date.getTimezoneOffset() * 60000);
      date = new Date(utc + (3600000 * gmt));
   }/*  w  w  w.  j a v a 2s .  c o  m*/
   for (var i = 0; i < pattern.length; i++) {
      var c = pattern[i];
      switch (c) {
         case 'd':
            result += ('0' + date.getDate()).slice(-2);
            break;
         
         case 'm':
            result += ('0' + String(date.getMonth()+1)).slice(-2);
            break;
         
         case 'Y':
            result += date.getFullYear();
            break;
         
         case 'H':
            result += ('0' + date.getHours()).slice(-2);
            break;

         case 'i':
            result += ('0' + date.getMinutes()).slice(-2);
            break;

         case 's':
            result += ('0' + date.getSeconds()).slice(-2);
            break;

         case '\\':
            result += pattern[++i];
            break;

         default:
            result += c;
            break;
      }
   }
   return result;
}

Related

1. format(formatStr)

   Date.prototype.format = function(formatStr) {
       var str = formatStr;
       var Week = ['?','?','?','?','?','?','?'];
       str = str.replace(/yyyy|YYYY/,this.getFullYear());
       str = str.replace(/yy|YY/,(this.getYear() % 100)>9?(this.getYear() % 100).toString():'0' + (this.getYear() % 100));
       str = str.replace(/MM/,this.getMonth()>9?this.getMonth().toString():'0' + this.getMonth());
       str = str.replace(/M/g,this.getMonth());
       str = str.replace(/w|W/g,Week[this.getDay()]);
       str = str.replace(/dd|DD/,this.getDate()>9?this.getDate().toString():'0' + this.getDate());
   ...
   

2. format(formatStr)

   Date.prototype.format= function(formatStr) 
   var date = this;
   var timeValues = function(){};
   timeValues.prototype = {
      year:function(){
       if(formatStr.indexOf("yyyy")>=0)
        return date.getYear();
   ...
   

3. format(pattern)

   Date.prototype.format = function(pattern) {
     var returnValue = pattern;
     var format = {
       "y+": this.getFullYear(),
       "M+": this.getMonth() + 1,
       "d+": this.getDate(),
       "H+": this.getHours(),
       "m+": this.getMinutes(),
       "s+": this.getSeconds(),
   ...
   

4. format(pattern)

   Date.prototype.format = function(pattern)
     if(!pattern){
       pattern = "yyyy-MM-dd";
     var o =
       "M+" : this.getMonth() + 1, 
       "d+" : this.getDate(), 
   ...
   

5. format(pattern)

   Date.prototype.format = function(pattern){
       var pattern = pattern;    
       var dateObj = {
           "Y" : this.getFullYear(),
           "M" : this.getMonth()+1,
           "D" : this.getDate(),
           "h" : this.getHours(),
           "m" : this.getMinutes(),
           "s" : this.getSeconds()
   ...
   

6. format(str)

   Date.prototype.format = function (str) {
     const o = {
       'y+': this.getFullYear(),
       'M+': this.getMonth() + 1,
       'd+': this.getDate(),
       'h+': this.getHours(),
       'm+': this.getMinutes(),
       's+': this.getSeconds()
     Object.keys(o).forEach(element => {
       str = str.replace(new RegExp(element), substr => {
         return String.prototype.padStart.call(o[element], substr.length, '0')
       })
     })
     return str
   

7. format(strFormat)

   Date.prototype.format = function (strFormat) {
     'use strict';
     var d = new Date(this),
       mon = ['', 'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'],
       month = ['', 'January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'],
       day = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'],
       weekday = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'],
       v = {
         's': String(d.getSeconds()),
   ...
   

8. format1()

   Date.prototype.format1 = function() {
       return "" + this.getMonth() + this.getFullYear();
   function f(d) {
       for (var i=0; i<60; i++) {
           assertEq(d.format1(), "91987");
   f(new Date("10/10/1987 1:11:11"));
   ...
   

9. formatAMPM(date)

   function formatAMPM(date) {
     var hours = date.getHours();
     var minutes = date.getMinutes();
     var ampm = hours >= 12 ? 'pm' : 'am';
     hours = hours % 12;
     hours = hours ? hours : 12; 
     minutes = minutes < 10 ? '0'+minutes : minutes;
     var strTime = hours + ':' + minutes + ' ' + ampm;
     return strTime;
   ...