javascript - 将公历日期转换为 jalali

Question

我有一个这样的函数:

var date = new Date();
var d = date.getDate();
var m = date.getMonth();
var y = date.getFullYear();

var hdr = {};

还有另一个函数可以转换它:

function gregorian_to_jalali($g_y,$g_m,$g_d,$mod=''){
    $g_y=tr_num($g_y); $g_m=tr_num($g_m); $g_d=tr_num($g_d);
 $d_4=$g_y%4;
 $g_a=array(0,0,31,59,90,120,151,181,212,243,273,304,334);
 $doy_g=$g_a[(int)$g_m]+$g_d;
 if($d_4==0 and $g_m>2)$doy_g++;
 $d_33=(int)((($g_y-16)%132)*.0305);
 $a=($d_33==3 or $d_33<($d_4-1) or $d_4==0)?286:287;
 $b=(($d_33==1 or $d_33==2) and ($d_33==$d_4 or $d_4==1))?78:(($d_33==3 and $d_4==0)?80:79);
 if((int)(($g_y-10)/63)==30){$a--;$b++;}
 if($doy_g>$b){
  $jy=$g_y-621; $doy_j=$doy_g-$b;
 }else{
  $jy=$g_y-622; $doy_j=$doy_g+$a;
 }
 if($doy_j<187){
  $jm=(int)(($doy_j-1)/31); $jd=$doy_j-(31*$jm++);
 }else{
  $jm=(int)(($doy_j-187)/30); $jd=$doy_j-186-($jm*30); $jm+=7;
 }
 return($mod=='')?array($jy,$jm,$jd):$jy.$mod.$jm.$mod.$jd;
}

我只是很困惑如何使用此函数将 hdr 日期转换为 jalali 日期？ 我尝试过，但没有成功:

1

var date = new jdate();
var d = date.getDate();
var m = date.getMonth();
var y = date.getFullYear();

var hdr = {};

2 还有这个:

var date = new Date();
var d = date.getDate();
var m = date.getMonth();
var y = date.getFullYear();
var hdr = gregorian_to_jalali(y,m,d);

//var hdr = {};

我做错了什么？

这行代码的作用是:var hdr = {}; ？

让我解释一下我的整个工作，我使用日历，我想将其更改为 jalali 日历，这是我的功能:

$('#calendar').fullCalendar({
            header: hdr,
            editable: true,
            droppable: true, // this allows things to be dropped onto the calendar !!!
            drop: function drop(date) {
                // this function is called when something is dropped

                // retrieve the dropped element's stored Event Object
                var originalEventObject = $(this).data('eventObject');

                // we need to copy it, so that multiple events don't have a reference to the same object
                var copiedEventObject = $.extend({}, originalEventObject);

                // assign it the date that was reported
                copiedEventObject.start = date;

                // render the event on the calendar
                // the last `true` argument determines if the event "sticks" (http://arshaw.com/fullcalendar/docs/event_rendering/renderEvent/)
                $('#calendar').fullCalendar('renderEvent', copiedEventObject, true);

                // is the "remove after drop" checkbox checked?
                if ($('#drop-remove').is(':checked')) {
                    // if so, remove the element from the "Draggable Events" list
                    $(this).remove();
                }
            },
            windowResize: function windowResize(event, ui) {
                $('#calendar').fullCalendar('render');
            }
        });

Answer 1

2022 年 3 月解决方案

将公历日期转换为波斯 (Jalali) 日期的简单方法是使用 Javascript 的 Intl.DateTimeFormat()。

以下是如何使用它将今天的日期转换为波斯 (Jalali) 日期:

const date = new Date(); // today's date

console.log("In Enlish               : ", new Intl.DateTimeFormat('en-u-ca-persian', { dateStyle: 'full' }).format(date));
console.log("In Persian              : ", new Intl.DateTimeFormat('fa-u-ca-persian', { dateStyle: 'full' }).format(date));
console.log("In Persian Latin Numbers: ", new Intl.DateTimeFormat('fa-u-ca-persian-nu-latn', { dateStyle: 'full' }).format(date));
console.log("In Arabic               : ", new Intl.DateTimeFormat('ar-u-ca-persian', { dateStyle: 'full' }).format(date));