add channel pullDownRefresh

@@ -9,6 +9,7 @@
         @scroll="scrollHandler"
         :options="options"
         @pulling-up="onPullingUp"
+        @pulling-down="onPullingDown"
         :data="productList.list">
         <div class="channel-body" ref="body">
           <div ref="topSource" class="channel-html">
@@ -53,10 +54,15 @@ export default {
   data() {
     return {
       options: {
-        bounce: {
-          top: false
-        },
-        pullUpLoad: true
+        // bounce: {
+        //   top: false
+        // },
+        scrollbar: true,
+        pullUpLoad: true,
+        pullDownRefresh: true,
+        pullDownRefresh: {
+          txt: '刷新成功',
+        }
       },
       scrollEvents: ['scroll'],
       scrollY: 0,
@@ -129,7 +135,11 @@ export default {
         this.params.isReset = false
         await this.fetchProductList(this.params);
       }
-    }
+    },
+    onPullingDown() {
+      this.params.isReset = true
+      this.fetchProductList(this.params);
+    },
   },
   components: {
     Swiper,