下拉树形

<treeselect
              @select="handleSelect"
              v-model="fromItemData.releaseDepartment"
              placeholder="请选择父节点名称"
              :normalizer="normalizer"
              style="width: 440px"
              :multiple="false"
              :options="dataTree"
              :disabled="disabledTrue"
            />
import Treeselect from "@riophae/vue-treeselect";
import "@riophae/vue-treeselect/dist/vue-treeselect.css";
handleSelect(node) {
      this.fromItemData.releaseDepartment = node.id;
      this.$refs.fromItemDataRef.validateField("releaseDepartment");
      // this.$refs.fromItemDataRef.fields[1].validateMessage = "";
    },
 normalizer(node) {
        return {
          id: node.id,
          label: node.orgName,
          children: node.children
            ? node.children.length > 0
              ? node.children
              : ""
            : "",
        };
      },
dataTree: [],  //树形递归结构