tree-树形数据处理-去除空子树及回显根据子节点查找所有父级

html

// 选择地址
<el-form-item prop="selectedOptions" label="地址" :rules="{ required: isShow, message: '请选择地址' }">
	<el-cascader :disabled="formcanwrite" size="large" :options="areaOptions" :style="{width:'100%'}" v-model="form.selectedOptions" :props="{ value: 'id', label: 'name'}" @change="handleChange" clearable>
    </el-cascader>
</el-form-item>

js

// 获取地址选项
    getDataArr() {
   
      var arr