// transition: all 2s; 
 .move-enter {
  margin-left: 0;
 }
 .move-enter-active {
  margin-left: 100px;
 }
 .move-enter-to {
  margin-left: 200px;
 }

 <transition appear name="move">
  <router-view></router-view>
 </transition>

@keyframes animationIn {
 0% {
 transform: translate(-100%, 0);
 }
 100% {
 transform: translate(0, 0);
 }
}
@keyframes animationOut {
 0% {
 transform: translate(0, 0);
 }
 100% {
 transform: translate(100%, 0);
 }
}

.move-enter {
 transform: translate(-100%, 0);
 position: absolute!important;
 z-index: 999;
 top: 0;
 left: 0;
 width: 100%;
}
.move-enter-active {
 animation: animationIn 0.2s;
 position: absolute!important; // 進入的組件要覆蓋掉移除的組件，參考 //https://cn.vuejs.org/v2/guide/transitions.html#%E8%BF%87%E6%B8%A1%E6%A8%A1%E5%BC%8F
 z-index: 999;
 top: 0;
 left: 0;
 width: 100%;
}
.move-leave {
 transform: translate(0, 0);
}
.move-leave-active {
 animation: animationOut 0.2s;
}

<transition
 v-on:before-enter="beforeEnter"
 v-on:enter="enter"
 v-on:after-enter="afterEnter"
 v-on:enter-cancelled="enterCancelled"

 v-on:before-leave="beforeLeave"
 v-on:leave="leave"
 v-on:after-leave="afterLeave"
 v-on:leave-cancelled="leaveCancelled"
>
 <!-- ... -->
</transition>

 <div class="main">
  <transition name="showRect" appear
     @before-enter="handleBeforeEnter"
     @enter="handleEnter"
     @after-enter="handleAfterEnter"
     @before-leave="handleBeforeLeave"
     @leave="handleLeave"
     @after-leave="handleAfterLeave"
     :css="false">
  <div class="box" v-if="show"></div>
  </transition>
 </div>
 <button @click="start">切換</button>

 methods: {
  start() {
  this.show = !this.show
  },
  handleBeforeEnter: function (el) {
  el.style.opacity = 0;
  console.log('方塊顯示動畫即將執(zhí)行');
  },
  handleEnter: function (el, done) {
  Velocity(el, 'stop');
  Velocity(el, {
   backgroundColor: '#0085eb',
   opacity: 1,
   translateX: 260,
   rotateZ: ['360deg', 0]
  }, {
   duration: 1000,
   easing: [ 0.4, 0.01, 0.165, 0.99 ],
   complete: done
  });
  console.log('方塊顯示動畫執(zhí)行中...');
  },
  handleAfterEnter: function (el) {
  console.log('方塊顯示動畫結束');
  },
  handleBeforeLeave: function (el) {
  console.log('方塊隱藏動畫即將執(zhí)行');
  },
  handleLeave: function (el, done) {
  Velocity(el, 'stop');
  Velocity(el, {
   backgroundColor: '#4dd0e1',
   opacity: 0,
   translateX: 0,
   rotateZ: [0, '360deg']
  }, {
   duration: 1000,
   easing: [ 0.4, 0.01, 0.165, 0.99 ],
   complete: done
  });
  console.log('方塊隱藏動畫執(zhí)行中...');
  },
  handleAfterLeave: function (el) {
  console.log('方塊隱藏動畫結束');
  }
 }

<template>
 <div>
 <div class="btn" @click="addItem">添加</div>
 <div class="btn" @click="sort">排序</div>
 <div class="box">
  <div class="item-bar">
  <transition-group name="fade" tag="p" appear
  v-on:before-enter="beforeEnter"
  v-on:after-enter="afterEnter">
  // 這里的data-index 是一個識別標識， 便于在js鉤子中獲得當前元素的序號
   <div class="item" v-for="(i, index) in list" :key="i" :data-index="index">{{i}}</div>
  </transition-group>
  </div>
 </div>
 </div>
</template>

<script lang="ts">
 import Vue from "vue";
 export default Vue.extend({
 name: "home",
 data() {
  return {
  show: true,
  list: [5,4,3,2,1],
  nextNum: 6
  };
 },
 methods: {
  showDom() {
  this.show = !this.show
  },
  beforeEnter: function (el: any) {
  el.style.opacity = 0 // 每個元素插入之前， 透明度為0
  let index = el.dataset.index 每次可能插入多個元素，
  // 頁面加載時先展示5個
  if (index < 5) {
   //設置動畫延遲， 實現(xiàn)按續(xù)插入的效果
   el.style.animationDelay = el.dataset.index * 0.3 + 's'
  }
  },
  afterEnter: function (el) {
  el.style.opacity = 1
  console.log('afterEnter')
  },
  addItem() {
  this.list.push(this.nextNum++)
  },
  sort() {
  this.list = this.list.sort((a, b) => a -b)
  }
 }
 });
</script>

 @keyframes animat {
 0% {
  margin-left: 300px;
  opacity: 0;
 }
 100% {
  margin-left: 0;
  opacity: 1;
 }
 }
 .fade-enter {
 opacity: 0;
 margin-left: 300px;
 }
 .fade-enter-active {
 opacity: 0;
 animation: animat 1s;
 }
 .fade-enter-to {
 opacity: 1;
 margin-left: 0;
 }

 .fade-move {
 transition: all 0.3s;
 }
 .fade-leave {
 left: 10px;
 }
 .fade-leave-active {
 transition: all 2s ease-out;
 }
 .fade-leave-to {
 left: -100%;
 }