Widget:Test

<script> document.addEventListener('DOMContentLoaded', function () {

 Date.prototype.getWeekNumber = function () {
   let d = new Date(Date.UTC(this.getFullYear(), this.getMonth(), this.getDate()));
   let dayNum = d.getUTCDay() || 7;
   d.setUTCDate(d.getUTCDate() + 4 - dayNum);
   let yearStart = new Date(Date.UTC(d.getUTCFullYear(), 0, 1));
   return Math.ceil((((d - yearStart) / 86400000) + 1) / 7)
 };

 const actualWeekNumber = new Date().getWeekNumber();
 const bossCard = document.getElementById('boss-card');

 const bosses = [
   {
     name: 'Suicune',
     image: 'Card_Boss-Fight-Suicune.png'
   },
   {
     name: 'Entei',
     image: 'Card_Boss-Fight-Entei.png'
   },
   {
     name: 'Raikou',
     image: 'Card_Boss-Fight-Raikou.png'
   }
 ];

 /*
   1° Suicune
   2° Entei
   3° Raikou
 */

 bossCard.src = bosses[actualWeekNumber % 3].image;
 bossCard.alt = bosses[actualWeekNumber % 3].name;

}); </script>