1.配置路由缓存 router.js文件或router文件夹下的index.js文件

  routes: [
    {
      path: '/hello',
      name: 'HelloWorld',
      component: HelloWorld,
      meta: {
        keepAlive: true // 需要缓存false//不需要缓存
      }
    }
]

2.配置App.vue文件种的<router-view/>

<keep-alive>
    <router-view v-if="$route.meta.keepAlive"></router-view>
</keep-alive>
<router-view v-if="!$route.meta.keepAlive"></router-view>

3.使用this.$router.back()返回