code: @Override
  	protected BundleRenderer createRenderer(ResourceBundlesHandler rsHandler,
  			Boolean useRandomParam, ComponentTag tag) {
  		
  		final IValueMap attributes = tag.getAttributes();
  		boolean async = attributes.getBoolean(JawrConstant.ASYNC_ATTR);
  		boolean defer = attributes.getBoolean(JawrConstant.DEFER_ATTR);
          String type = attributes.getString(JawrConstant.TYPE_ATTR);
          String crossorigin = attributes.getString(JawrConstant.CROSSORIGIN_ATTR);
  		return RendererFactory.getJsBundleRenderer(rsHandler, type, useRandomParam, async, defer, crossorigin);
  	}
docs: /* (non-Javadoc)
  @see net.jawr.web.wicket.AbstractJawrReference#createRenderer(net.jawr.web.resource.bundle.handler.ResourceBundlesHandler, boolean, org.apache.wicket.markup.ComponentTag)