problem with "document.body"

[media]

Hello community,

I have a problem with the "document.body" .
how do I add the "render.domElement" in a Qooxdoo class?

my Code:
var renderer = new THREE.WebGLRenderer();
document.body.appendChild(renderer.domElement);  

In Qooxdoo ???
var renderer = new THREE.WebGLRenderer();
this.add(renderer.domElement);


I have expanded the config.json file
"jobs": {
   "add-script": [{"uri": "three.js"}]
  }

Thanks!
media

[media]

I myself have found a solution.

var widget = new qx.ui.core.Widget();
 
widget.addListener("appear", function() {
  var el = widget.getContentElement().getDomElement();  
  el.appendChild(renderer.domElement);
  }, this);            

regards
media