perf: refs #8197 perf

src/components/common/VnSection.vue

@@ -51,7 +51,7 @@ const router = useRouter();
 
 let arrayData;
 const sectionValue = computed(() => $props.section ?? $props.dataKey);
-const isMainSection = ref();
+const isMainSection = ref(false);
 
 const searchbarId = 'section-searchbar';
 const hasContent = useHasContent(`#${searchbarId}`);
@@ -71,7 +71,7 @@ onMounted(() => {
     const unsubscribe = router.afterEach(() => {
         checkIsMain();
     });
-    onUnmounted(() => unsubscribe());
+    onUnmounted(unsubscribe);
 });
 
 function checkIsMain() {