update for make the recommend-for-you be sent after scroll. code review by LZF

@@ -10,28 +10,47 @@ var Swiper = require('yoho.iswiper'),
 
 var recommendSwiper,
     $recommendForYou = $('.recommend-for-you'),
-    preferenceUrl = $('#preferenceUrl').val();
-
-if (preferenceUrl) {
-    $.get(preferenceUrl).then(function(html) {
-        if (html.length < 5) {
-            $recommendForYou.css('display', 'none');
-        } else {
-            $recommendForYou.html(html).show();
-            if ($('#swiper-recommend').length) {
-                recommendSwiper = new Swiper('#swiper-recommend', {
-                    slidesPerView: 'auto',
-                    grabCursor: true,
-                    slideElement: 'a',
-                    lazyLoading: true,
-                    watchSlidesVisibility: true
-                });
+    preferenceUrl = $('#preferenceUrl').val(),
+    winH = $(window).height(),
+    end = false,
+    requesting = false;
+
+
+function request() {
+    if (requesting || end) {
+        return;
+    }
+
+    requesting = true;
+
+    if (preferenceUrl) {
+        $.get(preferenceUrl).then(function(html) {
+            if (html.length < 5) {
+                $recommendForYou.css('display', 'none');
+            } else {
+                $recommendForYou.html(html).show();
+                if ($('#swiper-recommend').length) {
+                    recommendSwiper = new Swiper('#swiper-recommend', {
+                        slidesPerView: 'auto',
+                        grabCursor: true,
+                        slideElement: 'a',
+                        lazyLoading: true,
+                        watchSlidesVisibility: true
+                    });
+                }
             }
-        }
 
-        window.rePosFooter();
+        requesting = false;
+        end = true;
 
-    }).fail(function() {
-        $recommendForYou.hide();
-    });
+        }).fail(function() {
+            $recommendForYou.hide();
+        });
+    }
 }
+
+$(window).scroll(function() {
+    if (!end || $(window).scrollTop() + winH >= $(document).height() - 50) {
+        request();
+    }
+});