<script src="https://unpkg.com/vue@latest"></script>
<script src="https://unpkg.com/axios@latest"></script>

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

<script>
App = {
  data() {
    return {
        message: "Hello world!"
    }
  }
}

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