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<!DOCTYPE html>
<html>
<head>
  <meta name="description" content="vuejs transition-group semantic-ui display lag">
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JS Bin</title>
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/semantic-ui/2.2.10/semantic.css">
  <script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.3.3/vue.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/Faker/3.1.0/faker.min.js"></script>
</head>
<body>
<div id="el">
  <button @click="transitionGroupOn = !transitionGroupOn">
    Transition Group {{ transitionGroupOn ? 'On' : 'Off' }}
  </button>
  <button @click="sliced = !sliced">
    {{ sliced ? 'Last 20 Shown' : 'All Shown' }}
  </button>
  <button @click="addItem()"> 
    Add Element ({{ localData.length }} Total)
  </button>
  <br><br>
​
  <table v-if="transitionGroupOn"> 
    <tbody tag="tbody" :name="animated ? 'fade' : ''" is="transition-group">      
      <tr v-for="c in changedData" :key="c.id">
        <td>{{ c.id }}</td>
        <td>{{ c.name }}</td>
        <td>{{ c.email }}</td>
      </tr>
    </tbody>
  </table>
​
  <table v-else>    
    <tbody>   
      <tr v-for="c in changedData" :key="c.id">
        <td>{{ c.id }}</td>
        <td>{{ c.name }}</td>
        <td>{{ c.email }}</td>
      </tr>
    </tbody>
  </table>
</div>
</body>
</html>
 
.fade-enter-active, .fade-leave-active {
  transition: opacity 1s;
}
.fade-enter, .fade-leave-to {
  opacity: 0;
}
​
td, th {
  border: 1px solid #999;
  padding: 0.5rem;
}
 
new Vue({
  el: '#el',
  computed: {
    changedData () {
      if (this.sliced) {
        return this.localData.slice(0, 20)
      } else {
        return this.localData
      }
    }
  },
  data () {
    return {
      localData: [],
      transitionGroupOn: true,
      sliced: true,
      animated: false
    }
  },
  methods: {
    addItem: function () {
      this.animated = true
      this.createItem()
      
       this.$nextTick(() => {
         this.animated = false
       })
    },
    createItem: function() {
      this.localData.unshift({
        id: (this.localData.length + 1),
        name: faker.name.findName(),
        email: faker.internet.email()
      })
    }
  },
  mounted () {
    for(var i=0; i<300; i++){
      this.createItem()
    }
  }
})
Output 300px

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