elementUI pull down the tree and click on the child node, get the data of the parent node and echo it

The renderings are as follows:

implement the code

//template
<el-select v-model="form.setPath" placeholder="请选择" style="width: 560px;" clearable>
                <el-option
                  :value="form.setPath"
                  :label="form.setPath"
                  style="width: 560px; height: 200px; overflow: auto; background-color: #fff;"
                >
                  <el-tree  ref="tree" :data="treeData" :props="defaultProps" @node-click="handleNodeClick">
                  </el-tree>
                </el-option>
              </el-select>
//---------------------------------------------------
//script
export default {
    
    
 data(){
    
    
    return{
    
    
		form:{
    
    
        	setPath:'',
        	renderFile:'',
      		 },
      		 
      	treeData: [{
    
    
        label: '一级 1',
        children: [{
    
    
          label: '二级 1-1',
          children: [{
    
    
            label: '三级 1-1-1'
          }]
        }]
      }, {
    
    
        label: '一级 2',
        children: [{
    
    
          label: '二级 2-1',
          children: [{
    
    
            label: '三级 2-1-1'
          }]
        }, {
    
    
          label: '二级 2-2',
          children: [{
    
    
            label: '三级 2-2-1'
          }]
        }]
      }, {
    
    
        label: '一级 3',
        children: [{
    
    
          label: '二级 3-1',
          children: [{
    
    
            label: '三级 3-1-1'
          }]
        }, {
    
    
          label: '二级 3-2',
          children: [{
    
    
            label: '三级 3-2-1'
          }]
        }]
      }],

      defaultProps: {
    
    
        children: 'children',
        label: 'label'
      },
      	}
      },
  methods:{
    
    
  //点击节点
    handleNodeClick(data,node) {
    
    
      let path = [];
      // let parentLabel = node.parent.data.label;
      let parentLabel = node;

      //当前选中节点
      path.push(data.label);
      //层级数超过1
      if (node.level > 1){
    
    
        //变量上级父节点
        for (let i = 1; i < node.level; i++) {
    
    
          parentLabel = parentLabel.parent
          if (parentLabel !== null && parentLabel !== undefined){
    
    
            path.push(parentLabel.data.label);
          }
        }
        //反转
        path.reverse()
      }
      //回显
      this.form.setPath = path.join('/')
    },
}
}