(function() {
          
          const url = 'https://api.apparell.com/api/tracking/product/8579169321302/collect'
          const getCookie = function() {
            const name = '_apparell' + '=';
            const cDecoded = decodeURIComponent(document.cookie); 
            const cArr = cDecoded.split('; ');
            let res;
            cArr.forEach(val => {
              if (val.indexOf(name) === 0) res = val.substring(name.length);
            })
            return res
          };

          const cookie = getCookie() || '9409b81d-0a95-48ed-a73f-0ee0a6c23444';
          const expires = 'expires=' + new Date(Date.now() + 31536000000);
          document.cookie = '_apparell' + '=' + cookie + '; ' + expires + '; path=/';

          const getDefaultParams = function() {
            let x = 'connection=' + encodeURI(navigator.userAgent);
            x = x + '&lang=' + encodeURI(navigator.language); 
            x = x + '&referer=' + encodeURI(document.referrer); 
            x = x + '&url=' + encodeURI(window.location.href);
            x = x + '&cookie=' + cookie;
            return x
          };

          const sendData = function(data) {
            const r = new window.XMLHttpRequest;
            r.open('POST', url, true);
            r.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
            r.send(getDefaultParams() + data);
          };

          const initListeners = function() {
            sendData('&live=1');
            document.onvisibilitychange = function() {
              if (document.visibilityState === 'hidden') {
                sendData('&live=0');
              } else {
                sendData('&live=1');
              }
            };
          };
          
          sendData('&live=1');

        }).call(this);