vue 的keep-alive缓存功能的实现

<keep-alive>
  <router-view></router-view>
</keep-alive>

<!--这里是需要keepalive的-->
<keep-alive>
  <router-view v-if="$route.meta.keepAlive"></router-view>
<keep-alive>

<!-- 这里不会被keepAlive -->

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

{
  path: '',
  name: '',
  ponent: '',
  meta: {keepAlive: true}   // 这个是需要keepalive的
}，
{
  path: '',
  name: '',
  ponent: ,
  meta: {keepAlive: false}  // 这是不会被keepalive的
}

activated: function () {
  this.data = ‘'
}