H5-购物车：商品附加选择优化

htmldev/dashboard/src/views/sell/food/food.vue

@@ -202,11 +202,12 @@ export default {
         const idx = curAttach.findIndex(item => item === attachName)
 
         if (idx > -1) {
-          curAttach.splice(index, 1)
+          curAttach.splice(idx, 1)
         } else {
-          if (curAttach.length < max) {
-            curAttach.push(attachName)
+          if (curAttach.length >= max) {
+            curAttach.pop()
           }
+          curAttach.push(attachName)
         }
         allAttach.splice(index, 1, curAttach)
         Vue.set(this.objProductAttachs, SKUId, allAttach)