<template>     <div>         <transition :name="transitionName" @afterLeave="afterLeave">             <keep-alive>                 <router-view v-if="$route.meta.keepAlive"></router-view>             </keep-alive>         </transition>         <transition :name="transitionName" @afterLeave="afterLeave">             <router-view  v-if="!$route.meta.keepAlive" class="child-view"></router-view>          </transition>     </div></template> watch: {     $route(to, from) {     let toLevel = to.meta.level;     let fromLevel = from.meta.level;     this.transitionName = toLevel>fromLevel?'slide-left':'slide-right'      this.has = toLevel>fromLevel?false:true //判斷     }   }如上述代碼 只在router-view 進(jìn)行了v-if判斷 所以會(huì)存在兩個(gè)transition如果在 keepalive 上加 v-if 判斷 組件就不會(huì)緩存 如果在 transition加入判斷 頁面就不會(huì)顯示應(yīng)該在哪里判斷 又或者如何處理 ？求幫忙?。。?