Unable to load vue syntax

<div>    <h3>{{data.study_name}}</h3>
    <h4>{{data.stage_name}}</h4></div>
<script type="module">
  const app = new Vue({
    el: '#app',
    data() {
      return { 
data: { "study_name": "111", "stage_name": 222 }
}
}
})
</script> 
![微信图片_20210715134906](https://user-images.githubusercontent.com/42233480/125735571-a2dbfa18-ee40-431f-b713-73bf7dcbd373.png)
