Element-ui左侧菜单刷新依旧高亮显示当前菜单

 <el-menu class="sidebar-el-menu" :default-active="currentMenu" background-color="#324157" @select="handleSelect"
                 text-color="#bfcbd9" active-text-color="#20a0ff" router>
          <el-menu-item v-for="(item,index) in items" :key="index" :index="item.index">
            <i :class="item.icon"></i>
            <span slot="title">{{item.title}}</span>
          </el-menu-item>
        </el-menu>

        methods: {
      getUrl(){
      let self = this;
      let currentUrl = window.location.href;
      self.currentMenu = currentUrl.split(‘designer/‘)[1];
      }
},
created() {
      this.getUrl();
}