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element的级联选择器怎么判断子节点没值

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element的级联选择器怎么判断子节点没值

图片.png在使用element的级联选择器时，因为只给了二级菜单了路径与数据传输，所以只想让级联选择器显示到二级，但是现在判断一级菜单的子节点有值后 二级菜单就控制不了了 应该怎么办呀。图片.png


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