<template>  <div id="app">    <transition :name="transitionName">    <router-view class="child-view"></router-view>   </transition>   </div> </template>  <script>  export default {  name: 'app',  data () {   return {    transitionName: 'slide-left'   }  },  mounted () {  },  //監聽路由的路徑，可以通過不同的路徑去選擇不同的切換效果  watch: {   '$route' (to, from) {    if(to.path == '/'){     this.transitionName = 'slide-right';    }else{     this.transitionName = 'slide-left';    }   }  } } </script>  <style> .child-view {  position: absolute;  left: 0;  top: 0;  width: 100%;  height: 100%;  transition: all .5s cubic-bezier(.55,0,.1,1); } .slide-left-enter, .slide-right-leave-active {  opacity: 0;  -webkit-transform: translate(30px, 0);  transform: translate(30px, 0); } .slide-left-leave-active, .slide-right-enter {  opacity: 0;  -webkit-transform: translate(-30px, 0);  transform: translate(-30px, 0); } </style>