(function(d, w) {     function observeAddToCart() {         jQuery(w).on('ds.addtocart', function(event, data) {             jQuery.ajax({                 //This is the API to where to POST the data to.                 url: '/api/add_to_inventory_and_add_to_cart',                 type: 'POST',                 data: data             }).done(function(res) {                 //On success of the API call                 w.location = '/success';             }).fail(function(res) {                 //On fail of the API call                 alert(res.message);             });         });     }     if (d.addEventListener) {         d.addEventListener('ds.ready', function() {             observeAddToCart();         }, false);     } else if (d.attachEvent) {         d.documentElement.attachEvent('onpropertychange', function(event) {             if (event.propertyName === 'ds.ready')                 observeAddToCart();         });     } }(document, window));