side9527 commented on issue #9216: 怎么控制tree图的显示位置 URL: https://github.com/apache/incubator-echarts/issues/9216#issuecomment-432949546 前几天找到了一个比较蹩脚的解决方法，就是点击节点的时候根据chartChild._chartsViews[0]._data._graphicEls.length 来判断点击的节点是否为根节点（length < 3即为根节点），如果是根节点就使用chartChild.setOption(chartChild.getOption())重新产开，也算是不让他收起根节点吧，别的方法找了很多没找到，就先暂时用的这个，希望维护的大大可以开发一个控制每个节点是否能收缩的功能
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