protected function registerJs()
	{
		//prepare values
		$values = Json::encode($this->values);

		//prepare config
		$config = [
			'type'=>$this->type,
			'height'=>$this->height,
		];
		if ($this->type !== self::SPARKLINE_BAR) {
			$config['width'] = $this->width;
		}
		$config = Json::encode(ArrayHelper::merge($this->sparklineConfig, $config));

		//create and register js
		$js = sprintf("$('#%s').sparkline(%s, %s);", $this->id, $values, $config);
		$this->view->registerJs($js);
	}