How can I get a renderer in a-frame

Question

I try to use three.js library in a-frame.
For example,

var helper = new THREE.MMDHelper(renderer);

I don't know how to get a renderer in a-frame.

a-scene has a renderer property.
=> https://aframe.io/docs/0.3.0/core/scene.html
but, it's undefined.

document.querySelector('a-scene').renderer; <= undefined 

Please tell me how to get the rendere

Answer 1

You'll need to wait for the scene to initialize before a renderer is available:

 sceneEl.addEventListener('render-target-loaded', function () {
   // sceneEl.renderer is now set.  
 });