Aframe zoom control test

_text.js

AFRAME.registerComponent( 'cth-zoom', {
  schema: {
    to: { type: 'string' }
  },
  init: function () {
    var data = this.data;
    var el = this.el;
    var cameraEl = document.getElementById( 'cth-camera' );
    el.addEventListener( 'click', function () {
      var _camera = cameraEl.getAttribute( 'camera' );
      _camera.zoom = data.to;
      cameraEl.setAttribute( 'camera', _camera );
    });
  }
});