Vue.js 实现简易跑马灯滚动效果

<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <title>跑马灯 </title>
 <script src="https://cdn.bootcss.com/vue/2.5.17-beta.0/vue.min.js"></script>
 <style>
  div, ul, li, img {
   margin: 0;
   padding: 0;
   box-sizing: border-box;
   display: flex;
  }
 
  .horseLamp {
   width: 100%;
   height: 50px;
   align-items: center;
   background-color: #ddd;
   display: flex;
   box-sizing: border-box;
  }
  .horseLamp_box {
   display: block;
   position: relative;
   width: 60%;
   height: 30px;
   overflow: hidden;
  }
 
  .horseLamp_list {
   display: block;
   position: absolute;
   top: 0;
   left: 0;
  }
 
  .horseLamp_top {
   transition: all 0.2s;
   margin-top: -30px
  }
 
  .horseLamp_list li {
   height: 30px;
   line-height: 30px;
   font-size: 14px;
  }
 
 </style>
 
</head>
<body>
 
<div class="vueBox">
 <div class="horseLamp">
  <div class="horseLamp_box">
   <ul class="horseLamp_list" :class="{horseLamp_top:animate}">
    <li v-for="(item, index) in horseLampList">
     <img :src="item.img">
    </li>
   </ul>
  </div>
 </div>
</div>
 
<script type="text/javascript">
 const vm = new Vue ({
  el: ".vueBox",
  data: {
   animate: false,
   horseLampList: [
    {
     img:'../assets/logo.png'
    },
    {
     img:'../assets/logo.png'
    },
    {
     img:'../assets/logo.png'
    },
    {
     img:'../assets/logo.png'
    }
   ]
  },
  created: function () {
   setInterval (this.showhorseLamp, 600)
  },
  methods: {
   showhorseLamp: function () {
    this.animate = true;
    setTimeout (() => {
     this.horseLampList.push (this.horseLampList[ 0 ]);
     this.horseLampList.shift ();
     this.animate = false;
    }, 2000);
   }
  }
 });
</script>
 
 
</body>
</html>