code: function runTransient() {
    var c = document.createElement('canvas');
    var gl = c.getContext('webgl');
    var ext = gl.getExtension('WEBGL_debug_renderer_info');
    var renderer = gl.getParameter(ext.UNMASKED_RENDERER_WEBGL);
    console.log(renderer);
  }
docs: start  Called when the canvas is created to get the ball rolling.