element-tree获取选中和半选中状态的数据

"data" :props="defaultProps" show-checkbox node-key="rowId" ref="tree" @check-change="handleCheckChange">
//获取选中和半选中状态下的数据
handleCheckChange() {
   return this.$refs.tree.getCheckedNodes().concat(this.$refs.tree.getHalfCheckedNodes())
},

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