diff --git a/docs/default-theme-config/README.md b/docs/default-theme-config/README.md
index 010f8d1edd..4f525316df 100644
--- a/docs/default-theme-config/README.md
+++ b/docs/default-theme-config/README.md
@@ -259,6 +259,10 @@ module.exports = {
 }
 ```
 
+::: tip
+Built-in Search only builds index from the title, `h2` and `h3` headers, if you need full text search, you can use [Algolia Search](#algolia-search).
+:::
+
 ### Algolia Search
 
 The `themeConfig.algolia` option allows you to use [Algolia DocSearch](https://community.algolia.com/docsearch/) to replace the simple built-in search. To enable it, you need to provide at least `apiKey` and `indexName`:
diff --git a/lib/default-theme/DropdownTransition.vue b/lib/default-theme/DropdownTransition.vue
index 6a446d6efb..abad7ead54 100644
--- a/lib/default-theme/DropdownTransition.vue
+++ b/lib/default-theme/DropdownTransition.vue
@@ -9,7 +9,7 @@
 
 <script>
 export default {
-  name: 'SidebarGroup',
+  name: 'DropdownTransition',
   methods: {
     setHeight (items) {
       // explicitly set height so that it can be transitioned