soda event + add to card with fetch

(function(){
    var sourceURL = window.location.origin + '/cart/add.js';
    var productId = '12321242611754';
    var eventType = 'Adoric - Carousel Recipe Rose Paloma A/B';
    var data = JSON.stringify({id: productId, quantity: 1});
    var eventElementType = 'Added to the cart';
    var productName = 'Rose Paloma One Item (Soda Press Pink Grapefruit - 500ml)';
    fetch(sourceURL, {
        method: 'POST',
        headers: {
          'Content-Type': 'application/json;charset=utf-8',
          'cache-control': 'no-cache'
        },
        body: data
      }).then(responce => {
          if (responce.status == 200){
        pushCustomGAEvent(eventType, eventElementType, productName);
        window.location.href = window.location.origin + '/cart';
          }
      }).catch(e => console.error(e))
    function pushCustomGAEvent(eventType, eventElementType, elementId) {
        if (window.preDataLayer) {
            window.preDataLayer.push({
                event: 'newEvent',
                newEventData: {
                    type: eventType,
                    elementType: eventElementType,
                    elementId: elementId
                }
            });
        }
    }
})();