【功能优化】菜单管理：使用 el-table-v2 解决菜单过多后，存在卡顿的问题

Author: YunaiV

src/directives/permission/hasPermi.ts

@@ -5,18 +5,10 @@ const { t } = useI18n() // 国际化
 
 export function hasPermi(app: App<Element>) {
   app.directive('hasPermi', (el, binding) => {
-    const { wsCache } = useCache()
     const { value } = binding
-    const all_permission = '*:*:*'
-    const userInfo = wsCache.get(CACHE_KEY.USER)
-    const permissions = userInfo?.permissions || []
 
     if (value && value instanceof Array && value.length > 0) {
-      const permissionFlag = value
-
-      const hasPermissions = permissions.some((permission: string) => {
-        return all_permission === permission || permissionFlag.includes(permission)
-      })
+      const hasPermissions = hasPermission(value)
 
       if (!hasPermissions) {
         el.parentNode && el.parentNode.removeChild(el)
@@ -26,3 +18,14 @@ export function hasPermi(app: App<Element>) {
     }
   })
 }
+
+export const hasPermission = (permission: string[]) => {
+  const { wsCache } = useCache()
+  const all_permission = '*:*:*'
+  const userInfo = wsCache.get(CACHE_KEY.USER)
+  const permissions = userInfo?.permissions || []
+
+  return permissions.some((p: string) => {
+    return all_permission === p || permission.includes(p)
+  })
+}

src/views/system/area/index.vue

@@ -16,6 +16,7 @@
         <template #default="{ height, width }">
           <!-- Virtualized Table 虚拟化表格：高性能，解决表格在大数据量下的卡顿问题 -->
           <el-table-v2
+            v-loading="loading"
             :columns="columns"
             :data="list"
             :width="width"
@@ -31,7 +32,7 @@
   <AreaForm ref="formRef" />
 </template>
 <script setup lang="tsx">
-import type { Column } from 'element-plus'
+import { Column } from 'element-plus'
 import AreaForm from './AreaForm.vue'
 import * as AreaApi from '@/api/system/area'
 
@@ -40,7 +41,7 @@ defineOptions({ name: 'SystemArea' })
 // 表格的 column 字段
 const columns: Column[] = [
   {
-    dataKey: 'id', // 需要渲染当前列的数据字段。例如说：{id:9527, name:'Mike'}，则填 id
+    dataKey: 'id', // 需要渲染当前列的数据字段
     title: '编号', // 显示在单元格表头的文本
     width: 400, // 当前列的宽度，必须设置
     fixed: true, // 是否固定列
@@ -52,14 +53,17 @@ const columns: Column[] = [
     width: 200
   }
 ]
-// 表格的数据
-const list = ref([])
+const loading = ref(true) // 列表的加载中
+const list = ref([]) // 表格的数据
 
-/**
- * 获得数据列表
- */
+/** 获得数据列表 */
 const getList = async () => {
-  list.value = await AreaApi.getAreaTree()
+  loading.value = true
+  try {
+    list.value = await AreaApi.getAreaTree()
+  } finally {
+    loading.value = false
+  }
 }
 
 /** 添加/修改操作 */