使用element-ui导航，进入对应的三级页面菜单保持点击状态

1.注意事项

01.路由中使用了keepAlive属性，要用keepAlive：true，不能等于false，使用false页面会刷新

2.使用的方法

NavMenu 导航菜单

3.项目实例

路由配置

js文件
export default [
 {
    path: '/policyStoreIndex',
    name: '政策计算器导航页',
    redirect: '/policyjisuan',
    component: () =>
      import(/* webpackChunkName: "page" */ '@/views/home/policyStoreIndex'),
    meta: {
      keepAlive: true,
      isTab: false,
      isAuth: false
    },
    children: [
    {
      path: '/searchP',
      name: '检索',
      component: () =>
        import(/* webpackChunkName: "page" */ '@/views/home/policyStoreNew/searchP'),
      meta: {
        keepAlive: true,
        isTab: false,
        isAuth: false
      }
    }]
   }
 ]