Element tree control integrates a drop-down menu with icons (tree+dropdown+input)

<el-col :span="4" :xs="24">
   <!--Directory search function-->
  <div class="head-container">
    <el-input
      v-model="dirNameCn"
      placeholder="Please enter the directory name"
      clearable
      size="small"
      prefix-icon="el-icon-search"
      style="margin-bottom: 20px"
    />
  </div>
  <!--Tree display-->
  <div class="head-container">
    <el-tree
      :data="dirTreeOptions"
      :props="defaultProps"
      :expand-on-click-node="false"
      :filter-node-method="filterNode"
      ref="tree"
      default-expand-all
      @node-click="handleNodeClick"
      icon-class="el-icon-folder-opened"
      node-key="id"
      :check-on-click-node="true"
    >
      <!--Hidden new icons-->
      <span class="custom-tree-node" slot-scope="{ node, data }" @mouseenter="mouseenter(data)" @mouseleave="mouseleave(data)">
        <span>{{ node.label }}</span>
        <div>
          <i v-show="data.show" class="el-icon-circle-plus" style="color: #00afff" @click="addDial(node, data)"/>
          <!--Hidden drop-down selection-->
          <el-dropdown trigger="click" placement="right" @command="(command) => {handleCommand(command)}">
            <i v-show="data.show" class="el-icon-more" style="color: #D3D3D3"/>
            <el-dropdown-menu slot="dropdown">
              <el-dropdown-item command="a">Rename</el-dropdown-item>
              <el-dropdown-item command="b">Delete</el-dropdown-item>
            </el-dropdown-menu>
          </el-dropdown>
        </div>
      </span>
    </el-tree>
  </div>
</el-col>

<script>
  export default {
    name: 'reqmdoctree',
    data() {
      return {
        // The content of the left search box dirNameCn: '',
       	// Directory tree options dirTreeOptions: undefined,
        defaultProps: {
          children: "children",
          label: "label"
        },
        //Whether there is a child node in the tree menu yesChild: undefined,
        // Control the newly added prompt information box on the left show: 0,
        // Query requirement document information parameters queryParams: {
          docNo: undefined, // Document number docNameEn: undefined, // Document English name dirNo: undefined, // Directory number current: 1, // Current page size: 20 // How many items are displayed per page },
        treeId: undefined,
      }
    },
    methods: {
      /** Query the drop-down tree structure of the required directory*/
      getTreeselect() {
        treeselect().then(response => {
          this.dirTreeOptions = response.data
        })
      },
      // Search value is filter function filterNode(value, data) {
        if (!value) return true
        return data.label.indexOf(value) !== -1
      },
      // callback function when the node is clicked handleNodeClick(data) {
        // console.log(data)
        this.treeId = data.id
        this.yesChild = data.children
        this.queryParams.dirNo = data.id
        this.getList()
      },
      //Events of three points in the tree handleCommand(command) {
        if (command == 'a') {
          selectReqNo(this.treeId).then(response => {
            this.uuid = response.msg
            getObjTree(response.msg).then(response => {
              this.form = response.data
              this.open = true
              this.title = 'Modify the requirements document directory configuration table'
            })
          })
        }
        if (command == 'b') {
          if (this.yesChild != undefined) {
            this.$notify.error({
              title: 'Warning',
              message: 'There are other folders in this directory'
            })
          } else {
            selectReqNo(this.treeId).then(response => {
              this.uuid = response.msg
              this.$confirm('Are you sure you want to delete the data item with ID ' + this.uuid + '?', 'Warning', {
                confirmButtonText: 'Confirm',
                cancelButtonText: 'Cancel',
                type: 'warning'
              }).then(()=>{
                return delObjTree(this.uuid)
              }).then(data => {
                this.getTreeselect()
                this.msgSuccess('Deleted successfully')
              }).catch(function() {
              })
            })
          }
        }
      },
      // Create a new directory/file on the left addDial(node, data) {
        // console.log(node, '---', data)
        this.reset()
        this.form.dirParentId = data.id
        this.open = true
        this.title = 'Add requirement document directory configuration table'
      },
      // Display icon when mouse hovers on the left mouseenter(data){
        this.$set(data, 'show', true)
      },
      // The icon will not be displayed when the left mouse leaves mouseleave(data){
        this.$set(data, 'show', false)
      },
      //Open the new resource pop-up window here......
    }
  }
</script>