去掉webstorm的报错

src/pages/shop/IncreaseData.vue

@@ -1,6 +1,6 @@
 <template>
     <div>
-        <Menu mode="horizontal"  :active-name="selectedItemName">
+        <Menu ref="menu" mode="horizontal"  :active-name="selectedItemName">
             <MenuItem :name="cItem.id" :to="cItem.resource" v-for="cItem in threeLevel"
                       :key="cItem.id">
                 {{cItem.name}}
@@ -21,6 +21,10 @@
                 selectedItemName: null,
             }
         },
+        created() {
+            this.threeLevel = JSON.parse(sessionStorage.getItem("threeLevel"));
+            this.menuInit();
+        },
         mounted() {
             this.threeLevel = JSON.parse(sessionStorage.getItem("threeLevel"));
             this.menuInit();
@@ -28,9 +32,9 @@
         methods:{
             menuInit(){
                 let that = this;
-                that.selectedItemName = [that.threeLevel[0].id];
+                that.selectedItemName = that.threeLevel[0].id;
                 this.$nextTick(() => {
-                    this.$refs.menu.updateActiveName();
+                    that.$refs.menu.updateActiveName();
                 });
             }
         }