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element-ui el-tree check事件不触发

需求是在给树形组件的复选框去除勾选的时候,要调用后端的接口,判断该节点是否被使用,如果使用就不能去勾选,刚开始用的是check-change方法,但是,会调用后端两次,
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,看到网上说,可以用check方法避免此问题,但是,我用check后就是不触发事件,
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,没有头绪,求大神指教。万分感谢!!!!


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