Element-UI表格如何自定义行列内容以满足特殊需求？

<template>
  <el-table :data="data">
    <el-table-column :row-class-name="rowClassName" label="Name" prop="name"></el-table-column>
    <el-table-column :cell-class-name="cellClassName" label="Age" prop="age"></el-table-column>
  </el-table>
</template>

<script>
import { ElTable, ElTableColumn } from 'element-ui';

export default {
  components: { ElTable, ElTableColumn },
  data() {
    return {
      data: [
        { name: 'John Doe', age: 30 },
        { name: 'Jane Doe', age: 25 },
        { name: 'Peter Pan', age: 35 }
      ],
    };
  },
  methods: {
    rowClassName(row, rowIndex) {
      if (row.age > 30) {
        return 'over-30';
      } else {
        return 'under-30';
      }
    },
    cellClassName(row, column, rowIndex, columnIndex) {
      if (column.prop === 'age' && row.age > 30) {
        return 'red-text';
      }
    },
  },
};
</script>

<style scoped>
.over-30 {
  background-color: lightblue;
}

.under-30 {
  background-color: lightgreen;
}

.red-text {
  color: red;
}
</style>