按钮闪烁问题

app/code/Magento/Checkout/view/frontend/templates/cart/methods.phtml

@@ -24,22 +24,14 @@
         var isMobile = window.matchMedia("(pointer:coarse)").matches;
         if (isMobile) {
             $(window).scroll(function () {
-                var checkoutBtn = $('.cart-container .checkout-methods-items li:first-child');
-                var positionUl = $('.checkout-methods-items');
-                var scrollTop = $(document).scrollTop();
-                var wh = $(document.body).height();
-                var offsetTop = $(positionUl).offset().top;
-                if (wh - offsetTop <= scrollTop) {
-                    if(!$(checkoutBtn).hasClass('button-static')){
-                        $(checkoutBtn).addClass('button-static');
-                    }
+                var positionUl = $('.cart-container .checkout-methods-items li:first-child')
+                if (window.outerHeight + $(document).scrollTop() < $(positionUl).parent().offset().top + 50) {
+                    $(positionUl).removeClass("button-static");
                 } else {
-                    if($(checkoutBtn).hasClass('button-static'))
-                    {
-                        $(checkoutBtn).removeClass('button-static');
-                    }
+                    $(positionUl).addClass("button-static");
+
                 }
             });
         }
     });
-</script>
\ No newline at end of file
+</script>