### 问题描述 在给timeline的prevIcon 和 nextIcon设置一个 svg、jpg或png图片时，timeline的prevIcon 和 nextIcon消失
可直接在官方示例上测试 http://echarts.baidu.com/examples/editor.html?c=mix-timeline-finance timeline 配置下添加下面的配置 ``` controlStyle: { prevIcon: 'image://http://sl.baidu.com/static/img/arrow-icon.png', nextIcon: 'image://http://sl.baidu.com/static/img/arrow-icon.png' }, ``` ### Version & Environment [版本及环境] + Browser version [chrome 68.0.3440.106]: + OS Version [mac os 10.12.4]: [ Full content available at: https://github.com/apache/incubator-echarts/issues/9148 ] This message was relayed via gitbox.apache.org for [email protected]
