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

<template>
  <el-table
    ref="singleTable"
    :data="tableData"
    highlight-current-row
    style="width: 100%"
    @current-change="handleCurrentChange"
  >
    <el-table-column type="index" width="50" />
    <el-table-column property="date" label="Date" width="120" />
    <el-table-column property="name" label="Name" width="120" />
    <el-table-column property="address" label="Address" />
  </el-table>
  <div style="margin-top: 20px">
    <el-button @click="setCurrent(tableData[1])">Select second row</el-button>
    <el-button @click="setCurrent()">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',
        },
      ],
      currentRow: null,
    }
  },

  methods: {
    setCurrent(row) {
      this.$refs.singleTable.setCurrentRow(row)
    },
    handleCurrentChange(val) {
      this.currentRow = val
    },
  },
}
</script>