Vue中的列表过渡

使用transition-group进行列表过渡;

<!DOCTYPE html>
<html lang="en" dir="ltr">

<head>
  <meta charset="utf-8">
  <title>Vue中的列表过渡</title>
  <script src="./vue.js"></script>
  <style media="screen">
    .v-enter,.v-leave-to{
      opacity:0;
    }
    .v-enter-active,.v-leave-active{
      transition:opacity 1s;
    }
  </style>
</head>

<body>
  <div id="root">
    <transition-group>
      <div v-for="item of list" :key="item.id">{{item.title}}</div>
    </transition-group>
    <button @click="handleBtnClick">add</button>
  </div>
  <script type="text/javascript">
    var count = 0
    var vm = new Vue({
      el: '#root',
      data: {
        list: []
      },
      methods: {
        handleBtnClick: function() {
          this.list.push({
            id: count++,
            title: 'hello world'
          })
        }
      }
    })
  </script>
</body>

</html>

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