el-table表格实现多选功能（全选/指定选中/取消选中）

vue项目开发中，如何实现el-table表格全选、指定选中、取消选中等功能，下面编程教程网小编给大家详细介绍一下具体实现代码！

template代码

<template>
  <el-table
    ref="multipleTable"
    :data="tableData"
    tooltip-effect="dark"
    style="width: 100%"
    @selection-change="handleSelectionChange">
    <el-table-column
      type="selection"
      width="55">
    </el-table-column>
    <el-table-column
      prop="name"
      label="姓名"
      width="120">
    </el-table-column>
    <el-table-column
      prop="age"
      label="年龄"
      show-overflow-tooltip>
    </el-table-column>
  </el-table>
  <div style="margin-top: 20px">
    <el-button @click="toggleSelection([tableData[3]])">切换第四行的选中状态</el-button>
    <el-button @click="toggleSelection()">取消选择</el-button>
  </div>
</template>

script代码

<script>
  export default {
    data() {
      return {
        tableData: [],
        multipleSelection: []
      }
    },

    methods: {
      //如果定义了指定选中项，点击选中指定项，否则取消选中
      toggleSelection(rows) {
        if (rows) {
          rows.forEach(row => {
            this.$refs.multipleTable.toggleRowSelection(row);
          });
        } else {
          this.$refs.multipleTable.clearSelection();
        }
      },
      handleSelectionChange(val) {
        this.multipleSelection = val;
      }
    }
  }
</script>