Sodastream Add to cart function + update button description.

<style>
   .repeater-item .element-text.repeater-item-inner[data-type="sale"] SPAN.inner-element {
        color: #00aeef !important;
    }
</style>
<script>
    (function() {
        function getUrlParameter(name, URL) {
            name = name.replace(/[\[]/, "\\[").replace(/[\]]/, "\\]");
            var regex = new RegExp("[\\?&]" + name + "=([^&#]*)");
            var results = regex.exec(URL);
            return results === null ? '' : decodeURIComponent(results[1].replace(/\+/g, " "));
        }

        function saveCartIds(productId) {
            var storedIds = adoric.Util.localStorageData('cart_ids');
            if (storedIds) {
                storedIds = storedIds.split(',');
                storedIds.push(productId);
            } else {
                storedIds = [];
                storedIds.push(productId);
            }
            adoric.Util.localStorageData('cart_ids', storedIds);
        }

        function adoricAddToCart(productId) {
            var data = {
                "id": productId,
                "quantity": 1
            };
            var xhr = new XMLHttpRequest();
            xhr.withCredentials = true;
            xhr.addEventListener('readystatechange', function() {
                if (this.readyState === 4) {
                    saveCartIds(productId);
                    console.log(this.responseText);
                    window.location.reload();
                }
            });
            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));
        }
        if (window.Element && !Element.prototype.closest) {
            Element.prototype.closest = function(s) {
                var matches = (this.document || this.ownerDocument).querySelectorAll(s),
                    i, el = this;
                do {
                    i = matches.length;
                    while (--i >= 0 && matches.item(i) !== el) {};
                } while ((i < 0) && (el = el.parentElement));
                return el;
            };
        }
        var currentCampaignRepeater = document.querySelector('.' + self.identifier + ' .repeater-content');
        currentCampaignRepeater.addEventListener('click', function(event) {
            var productItem = event.target.closest('.repeater-item');
            event.preventDefault();
            if (event.target.getAttribute('role') === 'button' && productItem) {
                var productInformation = JSON.parse(productItem.dataset.productInfo);
                var productId = getUrlParameter('variant', productInformation.link);
                window.ga && window.ga('t0.send', 'event', {
                    eventCategory: "Adoric - " + self.campaignTitle + '(' + self.versionTitle + ')',
                    eventAction: 'click',
                    eventLabel: 'Added to the cart - ' + productInformation.title,
                });
                event.target.innerText = 'Item added';
                adoricAddToCart(productId);
            }
        });
        setTimeout(function() {
            var storedIds = adoric.Util.localStorageData('cart_ids');
            var repeaterItems = document.querySelectorAll('.' + self.identifier + ' .repeater-item');
            storedIds = (storedIds ? storedIds.split(',') : []);
            repeaterItems.forEach(function(item) {
                console.log(storedIds);
                var data = JSON.parse(item.getAttribute('data-product-info'));
                var sale_price = data.sale_price;
                var id = getUrlParameter('variant', data.link);
                if (sale_price === '') {
                    item.querySelector('.element-text.repeater-item-inner[data-type="price"] SPAN.inner-element').style.textDecoration = 'none';
                }
                if (storedIds.some(function(storedId) {
                        return storedId === id;
                    })) {
                    item.querySelector('A BUTTON').innerText = 'Item added';
                }
            });
        }, 500);
    })();
</script>