Vue+elementui realizes multiple selection and search functions of drop-down table

<el-form 
:model="dataForm" 
:rules="dataRule" 
ref="dataForm" 
@keyup.enter.native="dataFormSubmit()"
label-width="120px" 
id="selecTable" 
@click.native="closeup">
<el-select 
 v-model="dataForm.processDefinitionId" 
 placeholder="Please select" 
 @change="handselect" 
 ref="select"
 @click.native="deptogglePanel($event)" 
 multiple 
 collapse-tags 
 size="medium">
  <el-option 
  v-for="(item,index) in processDefinition" 
  :key="index" 
  :label="item.name"
  :value="item.id">
  </el-option>
 </el-select>
 <div v-if="showTree" class="treeDiv" ref="tableList">
  <el-input placeholder="Search" 
  v-model="ss" 
  @input="handinput" 
  size="medium">
  </el-input>
  <el-table 
  @select="handleSelectClick" 
  @row-click="handleRegionNodeClick"
  @selection-change="handleChange" 
  ref="moviesTable" :data="memberList" border
  :row-key="getRowKeys" 
  :cell-style="getCellStyle" 
  :header-cell-style="getHeaderCellStyle"
  @select-all="selectAll">
   <el-table-column 
   type="selection" 
   header-align="center" 
   align="center" 
   :reserve-selection="true"
   width="50">
   </el-table-column>
   <el-table-column 
   v-for="(item, index) in Columns" 
   :key="index" 
   :prop="item.prop"
   :label="item.label" 
   :show-overflow-tooltip="true">
   </el-table-column>
 </el-table>
</div>
</el-form>

<script>
 export default {
  data() {
   return {
    ss: '',
    visible: false,
    isDisabled: false,
    dataForm: {
     termName: '', //Project nameprocessDefinitionId: []

    },
    dataRule: {
     processDefinitionId: [{
      required: true,
      message: 'Please select the file',
      trigger: 'change'
     }],
     termName: [{
      required: true,
      message: 'Project name cannot be empty',
      trigger: 'blur'
     }],
    },
    arr: [],
    processDefinition: [], //Process template drop-down box memberList: [], // list
    showTree: false,
    Columns: [{
      prop: 'number',
      label: 'File encoding'
     },
     {
      prop: 'name',
      label: 'File name'
     },
     {
      prop: 'typename',
      label: 'Template type'
     },
     {
      prop: 'efilename',
      label: 'File type'
     },
     {
      prop: 'version',
      label: 'version'
     },
    ],
    getRowKeys(row) {
     return row.id;
    },
    multipleSelection: [],
    isShowSelect: true
   }
  },
  created() {},
  mounted() {
  },
  watch:
   isShowSelect(val) {
    // Hide the drop-down box that comes with select this.$refs.select.blur();
   },
  },
  methods: {
   init() {
    this.$nextTick(() => {
     this.$refs['dataForm'].resetFields();
     this.isDisabled = false;
     this.arr = [];
     this.multipleSelection = [];
    }).then(() => {
     //Archive file drop-down box this.$axios.get("/term/getFileArchiveSelect").then((res) => {
      console.log('Archive file drop-down box:', res);
      if (res.data.code != 200) {
       this.memberList = []
      } else {
       this.processDefinition = res.data.page.list
       this.memberList = res.data.page.list // table assignment}
     })
     if (!this.dataForm.id) {
      // New // this.menuListTreeSetCurrentNode()
     } else {
      this.$axios.get("/term/getTermDeatil/" + this.dataForm.id).then((res) => {
       console.log("Project details:", res);
       if (res.data.code != 200) {
        // this.$message.error(res.data.msg)
       } else {
        let data = res.data.termResVO;
        if (data.fileArchiveIds != '') {
         this.dataForm.processDefinitionId = data.fileArchiveIds.split(',')
        } else {
         this.dataForm.processDefinitionId = []
        }
        this.multipleSelection = data.child;
        this.rowMultipleChecked(this.multipleSelection);
       }
      })
     }
    }).catch((error) => {
     console.log(error);
    });
   },
   // Table css
   getCellStyle() {
    return "text-align:center;"
   },
   getHeaderCellStyle() {
    return "background: rgba(9, 37, 56,0.1);text-align:center; background: linear-gradient(to bottom,#ffffff 0,#eeeeee 100%);padding: 4px 5px;"
   },
   // Click input to prevent bubbling and control table display and hide deptogglePanel(event) {
    this.isShowSelect = !this.isShowSelect; //Hide the original select drop-down box event || (event = window.event)
    event.stopPropagation ? event.stopPropagation() : (event.cancelBubble = true)
    this.showTree ? this.tableHide() : this.tableShow()
   },
   //Show the table tableShow() {
    this.showTree = true
    document.addEventListener('click', this.tableHideList, false)
    this.rowMultipleChecked(this.multipleSelection);
   },
   //Hide the table tableHide() {
    this.showTree = false
    document.addEventListener('click', this.tableHideList, false)
   },
   tableHideList(e) {
    if (this.$refs.tableList && !this.$refs.tableList.contains(e.target)) {
     this.tableHide()
    }
   },
   // Click on the table node handleRegionNodeClick(data) {
    this.showTree = true
   },
   //Multiple selection handleSelectClick(data) {
    this.showTree = true
   },
   //Select all selectAll(data) {
    this.showTree = true
   },
   // selection-change table multiple selection box change event handleChange(data) {//Selected row in the table this.arr = [];
    for (let i in data) {
     this.arr.push(data[i].id)
    }
    this.dataForm.processDefinitionId = this.arr; //select assignment this.multipleSelection = data; //Check and put it in the multipleSelection array},
   //Table multiple selection box selection judgment rowMultipleChecked(multipleSelection) {
    console.log(multipleSelection)
    if (multipleSelection != null) {
     for (let j = 0; j < multipleSelection.length; j++) {
      for (let i = 0; i < this.memberList.length; i++) {
       if (multipleSelection[j].id == this.memberList[i].id) {//If the id exists in the value sent from the backend, select the multiple selection box this.$nextTick(() => {//Required if (this.$refs.moviesTable != undefined) {
          this.$refs.moviesTable.toggleRowSelection(this.memberList[i], true);
         }
        })
       }
      }
     }
    }
   },
   //Delete the file handselect(value) {//Select is associated with the table let data = this.multipleSelection;
    let arr = [];
    if (value.length > 0) {//Delete the value in multipleSelection (all selected values)
     for (let j = 0; j < data.length; j++) {
      if (value.indexOf(data[j].id) == -1) {
       data.splice(j, 1)
      }
     }
     this.multipleSelection = data
    } else {
     this.multipleSelection = [];
     data = [];
    }
    for (let s in data) {
     arr.push(data[s].id)
    }
    if (arr != null) {//Need to determine which values ​​need to be unchecked for (let i = 0; i < this.memberList.length; i++) {
      if (arr.indexOf(this.memberList[i].id) == -1) {
       this.$refs.moviesTable.toggleRowSelection(this.memberList[i], false);
      }
     }
    }
   },
   //Search handinput() {
    console.log(this.ss);
    this.tableShow()
    this.$axios.get('/term/getFileArchiveSelect').then((res) => {
     console.log(res);
     if (res.data.code != 200) {} else {
      this.processDefinition = res.data.page.list
      this.memberList = res.data.page.list
      console.log(this.memberList)
      let resultData = this.memberList.filter(data => {
       if (data.number.indexOf(this.ss) != -1 || data.name.indexOf(this.ss) != -1 ||
        data.typename.indexOf(this.ss) != -1 || data.version.indexOf(this.ss) != -
        1 || data.efilename.indexOf(this.ss) != -1) { //You can continue to add judgment conditions return true;
       }
      });
      this.memberList = resultData;
     }
    })
   },
   // Form submission dataFormSubmit() {
    this.$refs['dataForm'].validate((valid) => {
     if (valid) {
      let url = this.dataForm.id ? '/term/updateTerm' : '/term/addTerm'
      if (this.dataForm.id == '') {
       this.isDisabled = true;
      }
      this.dataForm.id = this.dataForm.id || undefined;
      console.log(this.dataForm);
     }
    })
   },
  },
 }
</script>

<style>
 .applicaWord .el-upload-list__item .el-icon-close-tip {
  display: none !important;
 }
 .treeDiv {
  position: absolute;
  top: 52px;
  left: -1px;
  z-index: 1000;
  width: 100%;
  overflow:auto;
  max-height: 280px;
  /* border: 1px solid #ccc; */
  border-radius: 6px;
  background: #FFFFFF;
 }

 .treeDiv::-webkit-scrollbar {
  /*Overall scroll bar style*/
  width: 4px;
  /*Height and width correspond to the size of the horizontal and vertical scroll bars respectively*/
  height: 4px;
 }

 .treeDiv::-webkit-scrollbar-thumb {
  /*Small square inside the scroll bar*/
  border-radius: 5px;
  -webkit-box-shadow: inset 0 0 5px rgba(0, 0, 0, 0.2);
  background: rgba(0, 0, 0, 0.2);
 }

 .treeDiv::-webkit-scrollbar-track {
  /*Scroll bar track*/
  -webkit-box-shadow: inset 0 0 5px rgba(0, 0, 0, 0.2);
  border-radius: 0;
  background: rgba(0, 0, 0, 0.1);
 }

 .treeDiv .el-table {
  font-size: 14px;
 }

 .treeDiv .el-table /deep/ td {
  padding: 4px 0;
 }

 #selectTable .el-select {
  width: 100%;
 }

 #selectTable .el-input {
  width: 100%;
 }

 #kuan .el-form-item__content {
  width: 80%;
 }
</style>