<div class="w-table" :class="{'w-table_moving': dragState.dragging}">
 <el-table :data="data"
  :border="option.border"
  :height="option.height"
  :max-height="option.maxHeight"
  :style="{ width: parseInt(option.width)+'px' }"
  :header-cell-class-name="headerCellClassName"
 >
  <slot name="fixed"></slot>
  <el-table-column v-for="(col, index) in tableHeader" :key="index"
  :prop="col.prop"
  :label="col.label"
  :width="col.width"
  :min-width="col.minWidth"
  :type="col.type"
  :header-align="col.headerAlign"
  :column-key="index.toString()"
  :render-header="renderHeader"
  >
  </el-table-column>
 </el-table>
 </div>

props: {
 data: {
  default: function () {
  return []
  },
  type: Array
 },
 header: {
  default: function () {
  return []
  },
  type: Array
 },
 option: {
  default: function () {
  return {}
  },
  type: Object
 }
 }

data () {
 return {
  tableHeader: this.header,
  dragState: {
  start: -1, // 起始元素的 index
  end: -1, // 结束元素的 index
  move: -1, // 移动鼠标时所覆盖的元素 index
  dragging: false, // 是否正在拖动
  direction: undefined // 拖动方向
  }
 }
 }

 watch: {
 header (val, oldVal) {
  this.tableHeader = val
 }
 }

renderHeader (createElement, {column}) {
  return createElement(
  'div', {
   'class': ['thead-cell'],
   on: {
   mousedown: ($event) => { this.handleMouseDown($event, column) },
   mouseup: ($event) => { this.handleMouseUp($event, column) },
   mousemove: ($event) => { this.handleMouseMove($event, column) }
   }
  }, [
   // 添加 <a> 用于显示表头 label
   createElement('a', column.label),
   // 添加一个空标签用于显示拖动动画
   createElement('span', {
   'class': ['virtual']
   })
  ])
 },

// 按下鼠标开始拖动
handleMouseDown (e, column) {
 this.dragState.dragging = true
 this.dragState.start = parseInt(column.columnKey)
 // 给拖动时的虚拟容器添加宽高
 let table = document.getElementsByClassName('w-table')[0]
 let virtual = document.getElementsByClassName('virtual')
 for (let item of virtual) {
 item.style.height = table.clientHeight - 1 + 'px'
 item.style.width = item.parentElement.parentElement.clientWidth + 'px'
 }
},

// 鼠标放开结束拖动
handleMouseUp (e, column) {
 this.dragState.end = parseInt(column.columnKey) // 记录起始列
 this.dragColumn(this.dragState)
 // 初始化拖动状态
 this.dragState = {
 start: -1,
 end: -1,
 move: -1,
 dragging: false,
 direction: undefined
 }
},

// 拖动中
handleMouseMove (e, column) {
 if (this.dragState.dragging) {
 let index = parseInt(column.columnKey) // 记录起始列
 if (index - this.dragState.start !== 0) {
  this.dragState.direction = index - this.dragState.start < 0 "color: #3366ff">headerCellClassName 动态修改其 class



headerCellClassName ({column, columnIndex}) {
 return (columnIndex - 1 === this.dragState.move "virtual"> 添加虚线即可

贴一下我自己写的完整样式（使用了 sass 作为编译工具）：


<style lang="scss">
.w-table {
 .el-table th {
 padding: 0;
 .virtual{
  position: fixed;
  display: block;
  width: 0;
  height: 0;
  margin-left: -10px;
  z-index: 99;
  background: none;
  border: none;
 }
 &.darg_active_left {
  .virtual {
  border-left: 2px dotted #666;
  }
 }
 &.darg_active_right {
  .virtual {
  border-right: 2px dotted #666;
  }
 }
 }
 .thead-cell {
 padding: 0;
 display: inline-flex;
 flex-direction: column;
 align-items: left;
 cursor: pointer;
 overflow: initial;
 &:before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
 }
 }
 &.w-table_moving {
 .el-table th .thead-cell{
  cursor: move !important;
 }
 .el-table__fixed {
  cursor: not-allowed;
 }
 }
}



六、父组件调用



<template>
<div>
 <wTable :data="tableData" :header="tableHeader" :option="tableOption">
 <el-table-column slot="fixed"
  fixed
  prop="date"
  label="日期"
  width="150">
 </el-table-column>
 </wTable>
</div>
</template>

<script>
import wTable from '@/components/w-table.vue'
export default {
 name: 'Table',
 data () {
 return {
  tableOption: {
  border: true,
  maxHeight: 500
  },
  tableHeader: [{
  prop: 'name',
  label: '姓名',
  sortable: true,
  sortMethod: this.handleNameSort
  }, {
  prop: 'province',
  label: '省份',
  minWidth: '120'
  }, {
  prop: 'city',
  label: '市区',
  minWidth: '120'
  }, {
  prop: 'address',
  label: '地区',
  minWidth: '150'
  }, {
  prop: 'zip',
  label: '邮编',
  minWidth: '120'
  }],

  tableData: [{
  date: '2016-05-03',
  name: '王小虎',
  province: '上海',
  city: '普陀区',
  address: '上海市普陀区金沙江路 1518 弄',
  zip: 200333
  }, {
  date: '2016-05-02',
  name: '王小虎',
  province: '上海',
  city: '普陀区',
  address: '上海市普陀区金沙江路 1518 弄',
  zip: 200333
  }, {
  date: '2016-05-04',
  name: '王小虎',
  province: '上海',
  city: '普陀区',
  address: '上海市普陀区金沙江路 1518 弄',
  zip: 200333
  }, {
  date: '2016-05-01',
  name: '王小虎',
  province: '上海',
  city: '普陀区',
  address: '上海市普陀区金沙江路 1518 弄',
  zip: 200333
  }, {
  date: '2016-05-08',
  name: '王小虎',
  province: '上海',
  city: '普陀区',
  address: '上海市普陀区金沙江路 1518 弄',
  zip: 200333
  }, {
  date: '2016-05-06',
  name: '王小虎',
  province: '上海',
  city: '普陀区',
  address: '上海市普陀区金沙江路 1518 弄',
  zip: 200333
  }]
 }
 },
 methods: {
 handleNameSort () {
  console.log('handleNameSort')
 }
 },
 components: {
 wTable
 }
}
</script>



以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。