text: 'use strict';
  
  var AFaceProto = Object.create(HTMLElement.prototype);
  
  AFaceProto.createdCallback = function() {
    this.innerHTML = 'v0'
  };
  
  AFaceProto.attachedCallback = function () {
    this.classList.add('upgraded');
  }
  
  module.exports = document.registerElement('a-face', { prototype: AFaceProto});
  