vueapp.js

<script>
    const vueapp = new Vue({
      el: '#vueapp',
      data() {
        return {
          posts: []
        };
      },
      created() {
        const API_POSTS = 'https://jsonplaceholder.typicode.com/posts';
        fetch(API_POSTS, {method: 'GET'})
        .then(res =>; res.json())
        .then(json =>; {
          this.posts = json;
        })
        .catch(err =>; console.log(err));
      },
    });
</script>