Vue v-cloak

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        [v-cloak]{
            display: none;
        }
    </style>
</head>
<body>
    <div id="app">
        <h1 v-cloak>{{msg}}</h1>
    </div>
    <script src="js/vue.3.2.2.js"></script>
    <script>
       setTimeout(()=>{
           const app = Vue.createApp({
               data(){//定义数据
                   return {
                       msg:'你好！'
                   }
               }
           }).mount('#app');
       },1000);
    </script>
</body>
</html>

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