Edit in JSFiddle

var demo = new Vue({
    el: '#demo',
    data: {
        message: 'Hello Vue.js!'
    }
})
<div id="demo"  v-cloak>
    <p>{{message}}</p>
    <input v-model="message">
</div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.6/vue.min.js"></script>
[v-cloak] {
  display:none;
}