Example code for implementing dynamic column filtering in vue+element table

<el-popover placement="right" title="Column filter" trigger="click" width="420">            
	<el-checkbox-group v-model="checkedColumns" size="mini">
		<el-checkbox v-for="item in checkBoxGroup" :key="item" :label="item" :value="item"></el-checkbox>
	</el-checkbox-group>
	<el-button slot="reference" type="primary" size="small" plain><i class="el-icon-arrow-down el-icon-menu" />List item display filter</el-button>
</el-popover>

<el-table :data="attendanceList" @sort-change="sort" highlight-current-row :row-class-name="holidayRow" @selection-change="editAll" ref="multipleTable">
	<el-table-column type="selection" width="55" align="center"></el-table-column>
		<el-table-column label="Basic information of employees">
		<el-table-column v-if="colData[0].istrue" align="center" prop="user_id" label="Work No." width="80" fixed></el-table-column>
		<el-table-column v-if="colData[1].istrue" align="center" prop="name" label="姓名" width="80" fixed></el-table-column>
		<el-table-column v-if="colData[2].istrue" align="center" prop="age" label="age" width="60"></el-table-column>
		<el-table-column v-if="colData[3].istrue" align="center" prop="gender" label="Gender" width="80"></el-table-column>
		<el-table-column v-if="colData[4].istrue" align="center" prop="department" label="Department Name" width="100"></el-table-column>
	</el-table-column>
	......

	//List dynamic hiding colData: [
	   { title: "Work Number", istrue: true },
	   { title: "Name", istrue: true },
	   { title: "Age", istrue: true },
	   { title: "Gender", istrue: true },
	   { title: "Department Name", istrue: true },	   
	 ],
	 checkBoxGroup: [],
	 checkedColumns: [],

created() {      
	  // Column filtering this.colData.forEach((item, index) => {
	    this.checkBoxGroup.push(item.title);
	    this.checkedColumns.push(item.title);
	  })
	  this.checkedColumns = this.checkedColumns
	  let UnData = localStorage.getItem(this.colTable)
	  UnData = JSON.parse(UnData)
	  if (UnData != null) {
	    this.checkedColumns = this.checkedColumns.filter((item) => {
	      return !UnData.includes(item)
	    })
	  }
	},
 // Monitoring column hide watch: {
   checkedColumns(val,value) {
     let arr = this.checkBoxGroup.filter(i => !val.includes(i)); // Unchecked localStorage.setItem(this.colTable, JSON.stringify(arr))
     this.colData.filter(i => {
       if (arr.indexOf(i.title) != -1) {
         i.istrue = false;
       } else {
         i.istrue = true;
       }
     });
   }
 },