element-plus/docs/examples/table/with-status.vue

<template>
  <el-table
    :data="tableData"
    style="width: 100%"
    :row-class-name="tableRowClassName"
  >
    <el-table-column prop="date" label="Date" width="180" />
    <el-table-column prop="name" label="Name" width="180" />
    <el-table-column prop="address" label="Address" />
  </el-table>
</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',
        },
      ],
    }
  },
  methods: {
    tableRowClassName({ row, rowIndex }) {
      if (rowIndex === 1) {
        return 'warning-row'
      } else if (rowIndex === 3) {
        return 'success-row'
      }
      return ''
    },
  },
}
</script>

<style>
.el-table .warning-row {
  --el-table-tr-bg-color: var(--el-color-warning-lighter);
}
.el-table .success-row {
  --el-table-tr-bg-color: var(--el-color-success-lighter);
}
</style>