Soda static add to cart template

(function() {
  var GA_EVENT_CATEGORY = 'Adoric';
  var GA_EVENT_ACTION = 'click - ADDTOCART';
  var GA_EVENT_LABEL = 'DUO Upgrade Angebot';
  var PDRODUCT_ID = '39575250960463';

  function adoricAddToCart(productId) {
    var data = {
      "id": productId,
      "quantity": 1
    };
    var xhr = new XMLHttpRequest();
    xhr.withCredentials = true;
    xhr.addEventListener('readystatechange', function() {
      if (this.readyState === 4) {
        console.log(this.responseText);
        window.ga && window.ga("t0.send", "event", {
          eventCategory: GA_EVENT_CATEGORY,
          eventAction: GA_EVENT_ACTION,
          eventLabel: GA_EVENT_LABEL
        });
        window.location.href = window.location.origin + '/cart';
      }
    });
    xhr.open('POST', window.location.origin + '/cart/add.js');
    xhr.setRequestHeader('content-type', 'application/json');
    xhr.setRequestHeader('cache-control', 'no-cache');
    xhr.send(JSON.stringify(data));
  }
  adoricAddToCart(PDRODUCT_ID);
})();