SALE 页面前端优化

@@ -41,7 +41,9 @@
         {{> common/floor-header}}
     {{/floorHeader}}
 
-    {{> common/filter-nav}}
+    <div class="sale-nav-wrap">
+        {{> common/filter-nav}}
+    </div>
 
     {{> product/sale/common}}
 

@@ -29,13 +29,18 @@ $('.swiper-container').each(function() {
 });
 
 $(function() {
+    var $body = $('body');
     var $saleNavSelect = $('.sale-nav-select');
     var $vipFloor = $('.vip-floor');
+    var $saleNavWrap = $('.sale-nav-wrap');
+    var $listNav = $saleNavWrap.find('#list-nav');
 
     $('.sale-nav').on('click', function() {
         $saleNavSelect.toggleClass('show');
     });
 
+    lazyload($('img.lazy'));
+
     // 读取会员专享商品
     $.ajax({
         url: '/product/sale/search',
@@ -53,4 +58,15 @@ $(function() {
             lazyload($vipFloor.find('img.lazy'));
         }
     });
+
+    $saleNavWrap.css({
+        height: $saleNavWrap.height()
+    });
+    $(window).on('scroll', function() {
+        if ($body.scrollTop() > $saleNavWrap.offset().top) {
+            $listNav.addClass('fixed');
+        } else {
+            $listNav.removeClass('fixed');
+        }
+    }).trigger('scroll');
 });

@@ -98,6 +98,18 @@
             display: none;
         }
     }
+
+    .list-nav {
+        width: 100%;
+        z-index: 1;
+        background: #fff;
+
+        &.fixed {
+            position: fixed;
+            top: 0;
+            left: 0;
+        }
+    }
 }
 
 .sale-vip-page {