單選可過濾、關閉的Tree

功能如下展示：

在公共的地方寫好被引用的樹

<template>
  <el-select
    ref="selector"
    :value="valueTitle"
    :clearable="clearable"
    @clear="clearHandle"
  >
    <el-input
      v-model="filterText"
      class="selectInput"
      :placeholder="placeholder"
    />

    <el-option
      :value="valueTitle"
      :label="valueTitle"
      class="options"
    >
      <el-tree
        id="tree-option"
        ref="selectTree"
        :accordion="accordion"
        :data="options"
        :props="props"
        :node-key="props.value"
        :default-expanded-keys="defaultExpandedKey"
        :filter-node-method="filterNode"
        @node-click="handleNodeClick"
      />
    </el-option>
  </el-select>
</template>

<script>
export default {
  name: 'ElTreeSelect',
  props: {
    /* 配置項 */
    props: {
      type: Object,
      default: () => {
        return {
          value: 'id', // ID字段名
          label: 'title', // 顯示名稱
          children: 'children', // 子級字段名
        };
      },
    },
    /* 選項列表數據(樹形結構的對象數組) */
    options: {
      type: Array,
      default: () => { return []; },
    },
    /* 初始值 */
    //  type: Number,
    value: {
      type: String,
      default: () => { return null; },
    },
    /* 可清空選項 */
    clearable: {
      type: Boolean,
      default: () => { return true; },
    },
    /* 自動收起 */
    accordion: {
      type: Boolean,
      default: () => { return false; },
    },
    placeholder: {
      type: String,
      default: () => { return '檢索關鍵字'; },
    },
  },
  data() {
    return {
      filterText: '',
      valueId: this.value, // 初始值
      valueTitle: '',
      defaultExpandedKey: [],
    };
  },
  watch: {
    value() {
      this.valueId = this.value;
      this.initHandle();
    },
    filterText(val) {
      this.$refs.selectTree.filter(val);
    },
  },
  mounted() {
    this.initHandle();
  },
  methods: {
    // 初始化值
    initHandle() {
      if (this.valueId) {
        console.log(this.options);
        this.valueTitle = this.$refs.selectTree.getNode(this.valueId).data[this.props.label]; // 初始化顯示
        this.$refs.selectTree.setCurrentKey(this.valueId); // 設置默認選中
        this.defaultExpandedKey = [this.valueId]; // 設置默認展開
      }
      this.initScroll();
    },
    // 初始化滾動條
    initScroll() {
      this.$nextTick(() => {
        const scrollWrap = document.querySelectorAll('.el-scrollbar .el-select-dropdown__wrap')[0];
        const scrollBar = document.querySelectorAll('.el-scrollbar .el-scrollbar__bar');
        scrollWrap.style.cssText = 'margin: 0px; max-height: none; overflow: hidden;';
        // eslint-disable-next-line no-return-assign
        scrollBar.forEach(ele => ele.style.width = 0);
      });
    },
    // 切換選項
    handleNodeClick(node) {
      this.valueTitle = node[this.props.label];
      this.valueId = node[this.props.value];
      this.$emit('getValue', this.valueId);
      this.defaultExpandedKey = [];
      this.$refs.selector.blur();
    },
    // 清除選中
    clearHandle() {
      this.valueTitle = '';
      this.valueId = null;
      this.defaultExpandedKey = [];
      this.clearSelected();
      this.$emit('getValue', null);
    },
    /* 清空選中樣式 */
    clearSelected() {
      const allNode = document.querySelectorAll('#tree-option .el-tree-node');
      allNode.forEach((element) => element.classList.remove('is-current'));
    },
    filterNode(value, data) {
      if (!value) return true;
      return data.name.indexOf(value) !== -1;
    },
  },
};
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
.el-scrollbar .el-scrollbar__view .el-select-dropdown__item {
  height: auto;
  max-height: 274px;
  padding: 0;
  overflow: hidden;
  overflow-y: auto;
}
.el-select-dropdown__item.selected {
  font-weight: normal;
}
ul li >>> .el-tree .el-tree-node__content {
  height: auto;
  padding: 0 20px;
}
.el-tree-node__label {
  font-weight: normal;
}
.el-tree >>> .is-current .el-tree-node__label {
  color: #409eff;
  font-weight: 700;
}
.el-tree >>> .is-current .el-tree-node__children .el-tree-node__label {
  color: #606266;
  font-weight: normal;
}
.selectInput {
  padding: 0 5px;
  box-sizing: border-box;
  width: 100%;
}
</style>

引用樹

 // 引用樹的結構
   <el-form-item
            label="xxx"
            :rules="rules.Null"
            prop="area"
          >
            <SelectTree
              :props="props"
              :options="admittanceAreaTrees"
              :value="enterdirectory.enterArea"
              :clearable="isClearable"
              :accordion="isAccordion"
              style="display: inline;"
              @getValue="getValue($event,'3180143')"
            />
          </el-form-item>

// 在一級目錄下面
import SelectTree from '../selectTree.vue';

script>
  export default {
    data() {
      return {
        enterdirectory:[],
        // 樹的值
        admittanceAreaTrees: [],
        props: {
        // 配置項（必選）
        parent: 'parentId', // 父級唯一標識
        value: 'id',
        label: 'name',
        children: 'children',
      },
      // 可清空（可選）
      isClearable: true,
      // 可收起（可選）
      isAccordion: false,
      filterText: '',
      },
      };
    },
// 樹引用
  components: {
    SelectTree,
  },
    methods: {

 getValue (value, code) {
      if (code === '3180145') {
        this.enterdirectory['gdj'] = value;
      } else if (code === '3180143') {
        this.enterdirectory['enterArea'] = value;
      }
      // 取值
      // this.valueId = value;
    },
       // 獲取樹的值(鉤子函數)
     // 合同類型下拉框-樹
    selectContractTypeList() {
      selectContractType({}).then((response) => {
        this.contractTypeList = response.data;
      });
    },

    },
  };
</script>