element-plus/docs/examples/table/multi-select.vue

<template>
  <el-table
    ref="multipleTable"
    :data="tableData"
    style="width: 100%"
    @selection-change="handleSelectionChange"
  >
    <el-table-column type="selection" width="55" />
    <el-table-column label="Date" width="120">
      <template #default="scope">{{ scope.row.date }}</template>
    </el-table-column>
    <el-table-column property="name" label="Name" width="120" />
    <el-table-column property="address" label="Address" show-overflow-tooltip />
  </el-table>
  <div style="margin-top: 20px">
    <el-button @click="toggleSelection([tableData[1], tableData[2]])"
      >Toggle selection status of second and third rows</el-button
    >
    <el-button @click="toggleSelection()">Clear selection</el-button>
  </div>
</template>

<script lang="ts">
export default {
  data() {
    return {
      tableData: [
        {
          date: '2016-05-03',
          name: 'Tom',
          address: 'No. 189, Grove St, Los Angeles',
        },
        {
          date: '2016-05-02',
          name: 'Tom',
          address: 'No. 189, Grove St, Los Angeles',
        },
        {
          date: '2016-05-04',
          name: 'Tom',
          address: 'No. 189, Grove St, Los Angeles',
        },
        {
          date: '2016-05-01',
          name: 'Tom',
          address: 'No. 189, Grove St, Los Angeles',
        },
        {
          date: '2016-05-08',
          name: 'Tom',
          address: 'No. 189, Grove St, Los Angeles',
        },
        {
          date: '2016-05-06',
          name: 'Tom',
          address: 'No. 189, Grove St, Los Angeles',
        },
        {
          date: '2016-05-07',
          name: 'Tom',
          address: 'No. 189, Grove St, Los Angeles',
        },
      ],
      multipleSelection: [],
    }
  },

  methods: {
    toggleSelection(rows) {
      if (rows) {
        rows.forEach((row) => {
          this.$refs.multipleTable.toggleRowSelection(row)
        })
      } else {
        this.$refs.multipleTable.clearSelection()
      }
    },
    handleSelectionChange(val) {
      this.multipleSelection = val
    },
  },
}
</script>