Adds a button to the Payback website to activate all coupons

paybackhelper.js

// ==UserScript==
// @name         Activate All Payback Coupons
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Activating all Coupons on Payback.de with one click
// @author       nakami
// @copyright    2022 nakami
// @license      GNU General Public License v2.0
// @include      http*://www.payback.de/coupons*
// @require      http://ajax.googleapis.com/ajax/libs/jquery/1.6.4/jquery.min.js
// @require      http://ajax.googleapis.com/ajax/libs/jqueryui/1.10.3/jquery-ui.min.js
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    function sleep(ms) {
      return new Promise(resolve => setTimeout(resolve, ms));
    }

    let mainSR = undefined;
    let coupons = undefined;

    sleep(2000).then(() => {
      var span = document.createElement("span");
      span.innerHTML = '<input type="button" href="javascript:void(0);" title="Activate all Coupons" value="Activate all Coupons">';
      span.addEventListener("click", function(){
          alert('Starting the Work');
          mainSR = document.querySelector("#coupon-center").shadowRoot;
          coupons = mainSR.querySelectorAll("pbc-coupon");
          coupons.forEach((coupon) =>
            {
              try {
                coupon.shadowRoot.querySelector("pbc-coupon-call-to-action").shadowRoot.querySelector('button.not-activated').click();
              } catch (error) {
                console.error(error);
              }
            })
      }, false);
      document.querySelector('#coupon-center').shadowRoot.querySelector("div.coupon-center__filter").append(span);
    });
})();