el-table中使用span-method报错You may have an infinite update loop in a component render function.

在el-table中使用span-method时，如果出现报错"You may have an infinite update loop in a component render function."，通常是由于在span-method中更新了数据导致的。为了解决这个问题，可以将更新数据的操作放在异步方法中执行，例如使用Vue.nextTick()方法。具体操作如下：

<el-table :data="tableData">
  <el-table-column prop="name" label="Name" :span-method="handleSpanMethod"></el-table-column>
</el-table>

<script>
export default {
  data() {
    return {
      tableData: [
        { name: 'John', age: 22 },
        { name: 'Mike', age: 25 },
        { name: 'Amy', age: 20 }
      ]
    }
  },
  methods: {
    handleSpanMethod({ row, column, rowIndex, columnIndex }) {
      if (rowIndex === 0 && columnIndex === 0) {
        return {
          rowspan: 2,
          colspan: 1
        };
      } else if (rowIndex === 1 && columnIndex === 0) {
        return {
          rowspan: 0,
          colspan: 0
        };
      }
    }
  },
  computed: {
    ...mapState({
      // ...
    })
  },
  watch: {
    // ...
  }
}
</script>