重写elementui中el-table多个checkbox基础功能

表格组件中有内置的checkbox只需要设置type=selection，但是如果需要多个checkbox复选框selection，或者checkbox里面的dom有其他功能（包括需要颜色，不同状态等），那么就需要在重写el-table内部的el-checkbox的功能，在template 里面，包括头部的内容和列表内的内容

// 头部
 <template slot="header" slot-scope="scope"></el-table-column>
// 列表内
<template slot-scope="scope"></el-table-column>

完整实现到type=selection基础功能，主要两个方法：table头部方法handleSelectedFn()和点击table列表内方法handleListSelectedFn()

<template>
  <div>
    <el-table :data="tableData" stripe style="width: 100%">
      <el-table-column prop="selection" label="选择" width="180">
        <template slot="header" slot-scope="scope">
          <div>
            <el-checkbox v-model="selection" :indeterminate="isIndeterminate"
              @click.prevent.stop.native="handleSelectedFn('selection', 'isIndeterminate', scope)">
            </el-checkbox>
          </div>
        </template>
        <template slot-scope="scope">
          <div>
            <el-checkbox v-model="scope.row.selection"
              @click.prevent.stop.native="handleListSelectedFn('selection', 'isIndeterminate', scope)">
            </el-checkbox>
          </div>
        </template>
      </el-table-column>
      <el-table-column prop="name" label="姓名" width="180"> </el-table-column>
      <el-table-column prop="address" label="地址" width="180"> </el-table-column>
      <el-table-column prop="phone" label="电话" width="180"></el-table-column>
      <el-table-column prop="isRight" label="是否通过" width="180">
        <template slot="header" slot-scope="scope">
          <div>
            {{ "是否通过" }}
            <el-checkbox v-model="pass" :indeterminate="isIndeterminate1"
              @click.prevent.stop.native="handleSelectedFn('pass', 'isIndeterminate1', scope)">
            </el-checkbox>
          </div>
        </template>
        <template slot-scope="scope">
          <div>
            <el-checkbox v-model="scope.row.pass"
              @click.prevent.stop.native="handleListSelectedFn('pass', 'isIndeterminate1', scope)">
            </el-checkbox>
          </div>
        </template>
      </el-table-column>
    </el-table>
    <div style="margin-top: 20px">
      <el-button type="primary" @click="getTableDataFn">确定</el-button>
    </div>
  </div>
</template>
<script>
export default {
  data() {
    return {
      tableData: [
        {
          name: '张三',
          address: '3',
          phone: "1",
          selection: false,
          pass: false
        },
        {
          name: '李四',
          address: '3',
          phone: "1",
          selection: false,
          pass: false
        },
        {
          name: '王五',
          address: '3',
          phone: "1",
          selection: false,
          pass: false
        },
        {
          name: '赵六',
          address: '3',
          phone: "1",
          selection: false,
          pass: false
        },
      ],
      pass: false,
      selection: false,
      isIndeterminate: false,
      isIndeterminate1: false,
    }
  },
  methods: {
    handleSelectedFn(selectionvalue, isIndeterminatevalue) { // 点击table头部全选框
      // 头部全选框状态改变
      this[selectionvalue] = !this[selectionvalue];
      // 列表选择框状态改变
      for (let i = 0; i < this.tableData.length; i++) {
        this.tableData[i][selectionvalue] = this[selectionvalue];
        this[isIndeterminatevalue] = false;
      }
    },
    handleListSelectedFn(selectionvalue, isIndeterminatevalue, scope) { // 点击table列表内的选择框
      // table列表内选择框状态改变
      this.tableData[scope.$index][selectionvalue] = !this.tableData[scope.$index][selectionvalue]
      // 判断是否在全选状态下
      let statusSelectio = this.allSelectionFn(selectionvalue)
      if (statusSelectio) {
        // 列表全部被选中,头部变更为选中状态
        this[selectionvalue] = true;
        this[isIndeterminatevalue] = false;
        return false
      }
      // 列表有选中且非全选，头部全选框待定状态
      for (let i = 0; i < this.tableData.length; i++) {
        if (this.tableData[i][selectionvalue] === true) {
          this[isIndeterminatevalue] = true;
          return false
        }
      }
      // 列表有没有选中，头部全选框未选状态
      this[isIndeterminatevalue] = false;
      this[selectionvalue] = false;
    },
    allSelectionFn(selectionvalue) { // 判断是否在全选状态下
      for (let i = 0; i < this.tableData.length; i++) {
        if (this.tableData[i][selectionvalue] !== true) {
          return false
        }
      }
      return true
    },
    getTableDataFn() {
      for (let i = 0; i < this.tableData.length; i++) { 
        console.log("selection:",this.tableData[i].selection);
        console.log("pass:",this.tableData[i].pass);        
      }
    }
  }
}
</script>