drupal-vue/docroot/themes/custom/vue_js/src/components/articles/articles.es6.js

document.addEventListener('DOMContentLoaded', () => {
  'use strict';

  drupalSettings.articles = new Vue({ // eslint-disable-line no-unused-vars, no-undef, max-len
    el: '#vue-articles',
    data: {
      articles: []
    },
    mounted() {
      axios
        .get('/jsonapi/node/article?page[limit]=15')
        .then(response => (this.articles = response.data.data))
    }
  });
});