項(xiàng)目中使用el-tabs 發(fā)現(xiàn)會(huì)一次性把所有 tab 里的請(qǐng)求讀完，之后進(jìn)行 tab 切換，不再重新讀取請(qǐng)求
想要實(shí)現(xiàn)切換 tab 能實(shí)時(shí)更新數(shù)據(jù)的要求

<el-tabs type="border-card" class="root" v-model="activeName" @tab-click="handleTabClick">
   <el-tab-pane label="menu" name="menu">
     <menu-perm :menus="menus" v-if="tabRefresh.menu" />
   </el-tab-pane>
   <el-tab-pane label="perm" name="perm">
     <api-perm :permissions="permissions" v-if="tabRefresh.perm" />
   </el-tab-pane>
   <el-tab-pane label="data" name="data">
     <span v-if="tabRefresh.data">數(shù)據(jù)授權(quán)</span>
   </el-tab-pane>
 </el-tabs>

js 部分

export default {
  data () {
    return {
      activeName: 'menu',
      tabRefresh: {
        menu: true,
        perm: false,
        data: false
      }
    }
  },
  methods: {
    handleTabClick (tab) {
      this.activeName = tab.name
      switch (this.activeName) {
        case 'menu':
          this.switchTab('menu')
          break
        case 'perm':
          this.switchTab('perm')
          break
        case 'data':
          this.switchTab('data')
          break
      }
    },
    switchTab (tab) {
      for (let key in this.tabRefresh) {
        if (key === tab) {
          this.tabRefresh[key] = true
        } else {
          this.tabRefresh[key] = false
        }
      }
    },
  }
}

通過 v-if 進(jìn)行選擇性渲染，切換 tab 后，將其重新激活，并重新請(qǐng)求后端數(shù)據(jù)