diff --git a/frontend/src/components/sidebar/BrowserPane.vue b/frontend/src/components/sidebar/BrowserPane.vue
index 1f78d87..60bb8d6 100644
--- a/frontend/src/components/sidebar/BrowserPane.vue
+++ b/frontend/src/components/sidebar/BrowserPane.vue
@@ -100,7 +100,7 @@ const onReload = async () => {
         tabStore.setSelectedKeys(props.server)
         const db = props.db
         browserStore.closeDatabase(props.server, db)
-        browserTreeRef.value?.resetExpandKey(props.server, db)
+        // browserTreeRef.value?.resetExpandKey(props.server, db)
 
         let matchType = unref(filterForm.type)
         if (!types.hasOwnProperty(matchType)) {
diff --git a/frontend/src/objects/tabItem.js b/frontend/src/objects/tabItem.js
new file mode 100644
index 0000000..78bbe40
--- /dev/null
+++ b/frontend/src/objects/tabItem.js
@@ -0,0 +1,81 @@
+/**
+ * tab item
+ */
+export class TabItem {
+    /**
+     * @typedef {Object} CheckedKey
+     * @property {string} key
+     * @property {string} [redisKey]
+     */
+
+    /**
+     *
+     * @param {string} name connection name
+     * @param {string} title tab title
+     * @param {boolean} blank is blank tab
+     * @param {string} subTab secondary tab value
+     * @param {string} [title] tab title
+     * @param {string} [icon] tab icon
+     * @param {string[]} selectedKeys
+     * @param {CheckedKey[]} checkedKeys
+     * @param {string} [type] key type
+     * @param {*} [value] key value
+     * @param {string} [server] server name
+     * @param {int} [db] database index
+     * @param {string} [key] current key name
+     * @param {number[]|null|undefined} [keyCode] current key name as char array
+     * @param {number} [size] memory usage
+     * @param {number} [length] length of content or entries
+     * @param {int} [ttl] ttl of current key
+     * @param {string} [decode]
+     * @param {string} [format]
+     * @param {string} [matchPattern]
+     * @param {boolean} [end]
+     * @param {boolean} [loading]
+     */
+    constructor({
+        name,
+        title,
+        blank,
+        subTab,
+        icon,
+        selectedKeys,
+        checkedKeys,
+        type,
+        value,
+        server,
+        db = 0,
+        key,
+        keyCode,
+        size = 0,
+        length = 0,
+        ttl = 0,
+        decode = '',
+        format = '',
+        matchPattern = '',
+        end = false,
+        loading = false,
+    }) {
+        this.name = name
+        this.title = title
+        this.blank = blank
+        this.subTab = subTab
+        this.icon = icon
+        this.selectedKeys = selectedKeys
+        this.checkedKeys = checkedKeys
+        this.type = type
+        this.value = value
+        this.server = server
+        this.db = db
+        this.key = key
+        this.keyCode = keyCode
+        this.size = size
+        this.length = length
+        this.ttl = ttl
+        this.decode = decode
+        this.format = format
+        this.matchPattern = matchPattern
+        this.end = end
+        this.loading = loading
+    }
+}
diff --git a/frontend/src/stores/tab.js b/frontend/src/stores/tab.js
index 2a2e35b..ca33dae 100644
--- a/frontend/src/stores/tab.js
+++ b/frontend/src/stores/tab.js
@@ -1,38 +1,8 @@
 import { assign, find, findIndex, get, isEmpty, pullAt, remove, set, size } from 'lodash'
 import { defineStore } from 'pinia'
+import { TabItem } from '@/objects/tabItem.js'
 
 const useTabStore = defineStore('tab', {
-    /**
-     * @typedef {Object} TabItem
-     * @property {string} name connection name
-     * @property {boolean} blank is blank tab
-     * @property {string} subTab secondary tab value
-     * @property {string} [title] tab title
-     * @property {string} [icon] tab icon
-     * @property {string[]} selectedKeys
-     * @property {CheckedKey[]} checkedKeys
-     * @property {string} [type] key type
-     * @property {*} [value] key value
-     * @property {string} [server] server name
-     * @property {int} [db] database index
-     * @property {string} [key] current key name
-     * @property {number[]|null|undefined} [keyCode] current key name as char array
-     * @param {number} [size] memory usage
-     * @param {number} [length] length of content or entries
-     * @property {int} [ttl] ttl of current key
-     * @param {string} [decode]
-     * @param {string} [format]
-     * @param {string} [matchPattern]
-     * @param {boolean} [end]
-     * @param {boolean} [loading]
-     */
-
-    /**
-     * @typedef {Object} CheckedKey
-     * @property {string} key
-     * @property {string} [redisKey]
-     */
-
     /**
      * @typedef {Object} ListEntryItem
      * @property {string|number[]} v value
@@ -89,15 +59,22 @@ const useTabStore = defineStore('tab', {
      * @property {string} [dv] display value
      */
 
+    /**
+     * @typedef {Object} TabState
+     * @property {string} nav
+     * @property {number} asideWidth
+     * @property {TabItem[]} tabList
+     * @property {number} activatedIndex
+     */
+
     /**
      *
-     * @returns {{tabList: TabItem[], activatedTab: string, activatedIndex: number}}
+     * @returns {TabState}
      */
     state: () => ({
         nav: 'server',
         asideWidth: 300,
         tabList: [],
-        activatedTab: '',
         activatedIndex: 0, // current activated tab index
     }),
     getters: {
@@ -118,11 +95,6 @@ const useTabStore = defineStore('tab', {
          */
         currentTab() {
             return get(this.tabs, this.activatedIndex)
-            // let current = find(this.tabs, {name: this.activatedTab})
-            // if (current == null) {
-            //     current = this.tabs[0]
-            // }
-            // return current
         },
 
         currentTabName() {
@@ -183,7 +155,7 @@ const useTabStore = defineStore('tab', {
         upsertTab({ subTab, server, db, type, ttl, key, keyCode, size, length, matchPattern = '', clearValue }) {
             let tabIndex = findIndex(this.tabList, { name: server })
             if (tabIndex === -1) {
-                this.tabList.push({
+                const tabItem = new TabItem({
                     name: server,
                     title: server,
                     subTab,
@@ -198,6 +170,7 @@ const useTabStore = defineStore('tab', {
                     matchPattern,
                     value: undefined,
                 })
+                this.tabList.push(tabItem)
                 tabIndex = this.tabList.length - 1
             } else {
                 const tab = this.tabList[tabIndex]
@@ -219,7 +192,6 @@ const useTabStore = defineStore('tab', {
                 }
             }
             this._setActivatedIndex(tabIndex, true, subTab)
-            // this.activatedTab = tab.name
         },
 
         /**