How to use the apostrophe/vue function in apostrophe

const options = JSON.parse(el.getAttribute('data-options'));
    const data = JSON.parse(el.getAttribute('data'));
    const choices = JSON.parse(el.getAttribute('data-choices'));
    el.removeAttribute('data-apos-area-newly-editable');

    const component = window.apos.areas.components.editor;

    const docId = data._docId;
    const dotPath = data._dotPath;
    const parts = dotPath.split('.');
    const areaName = parts[parts.length - 1];
    const parentId = data._parentId;
    extantDocIds[docId] = true;

    return new Vue({
      el: el,
      data: {
        options: options,
        items: data.items,
        choices: choices,
        docId: docId,
        parentId: parentId,
        areaName: areaName
      },
      mounted() {
        updateParentIdMap(this, data.items, options);
      },
      methods: {
        changed(items) {
          updateParentIdMap(this, items);
          save();