M1 - Add product to cart using AJAX on PDP

gistfile1.txt

					if ($('product_addtocart_form')) {
						var data = $('product_addtocart_form').serialize();
						data += '&isAjax=1';
						var urlAddToCart = $('product_addtocart_form').action;

						new Ajax.Request(urlAddToCart,{
							method: 'POST',
			                async: false,
							parameters:  data,
							onSuccess: function (response) {
								console.log("CALL PAYPAL EXPRESS");
								callShortcutPopup();
							}
			            });
					}