koha-tmpl/intranet-tmpl/prog/en/includes/js-patron-get-age.inc

   1 <!-- js-patron-get-age.inc -->
   2 [% USE KohaDates %]
   3 <script>
   4     (function() {
   5
   6         const tz = '[% KohaDates.tz | html %]';
   7         window.$get_age = function(dob, options) {
   8             if(!dob) return '';
   9
  10             let today = new Date();
  11             dob = new Date(dob);
  12             if ( tz ) {
  13                 let today_tz = new Date(today.toLocaleString('en-US', {timeZone: tz}));
  14                 let diff = today.getTime() - today_tz.getTime();
  15                 today = new Date(today.getTime() - diff);
  16
  17                 let dob_tz = new Date(dob.toLocaleString('en-US', {timeZone: tz}));
  18                 diff = dob.getTime() - dob_tz.getTime();
  19                 dob = new Date(dob.getTime() - diff);
  20             }
  21             let age = today.getFullYear() - dob.getFullYear();
  22             let m = today.getMonth() - dob.getMonth();
  23             if (m < 0 || (m === 0 && today.getDate() < dob.getDate())) {
  24                 age--;
  25             }
  26             return age;
  27         }
  28
  29     })();
  30 </script>
  31 <!-- / js-patron-get-age.inc -->