el-tree 获取选中节点的父节点

<template>
  <el-tree
    :data="data"
    show-checkbox
    node-key="id"
    ref="tree"
    @node-click="handleNodeClick"
  >
  </el-tree>
</template>
 
<script>
export default {
  data() {
    return {
      data: []
    };
  },
  methods: {
    handleNodeClick(data) {
      const node = this.$refs.tree.getNode(data);
      const parentNode = node.parent; 
      if (parentNode.data) {
        console.log("父节点");
      }  
    }
  }
};
</script>