<div id="app">
  <h1>{{ message }}</h1>
</div>

<script src="https://unpkg.com/vue@3/dist/vue.global.js"></script>

<script>
  const app = Vue.createApp({
    data() {
      return {
        message: "Hello World!"
      }
    }
  });

  app.mount('#app');
</script>

