Table 表格 | Element Plus

<template>


    <el-table :data="tableData" border show-summary   :summary-method="getSummariesss" style="width: 100%">
      <el-table-column prop="id" label="ID" width="180" />
      <el-table-column prop="name" label="Name" />
      <el-table-column prop="amount1" sortable label="Amount 1" />
      <el-table-column prop="amount2" sortable label="Amount 2" />
      <el-table-column prop="amount3" sortable label="Amount 3" />
    </el-table>
  
   
  </template>
  
  <script lang="ts" setup>
  import { h } from 'vue'
  import type { VNode } from 'vue'
  import type { TableColumnCtx } from 'element-plus'
  
  interface Product {
    id: string
    name: string
    amount1: string
    amount2: string
    amount3: number
  }
  
  interface SummaryMethodProps<T = Product> {
    columns: TableColumnCtx<T>[]
    data: T[]
  }
  

 const  getSummariesss = (param: SummaryMethodProps)=>{
    const { columns, data } = param
        const sums = []
        columns.forEach((column, index) => {
          if (index === 0) {  //需要显示'总金额'的列 坐标 :0 
            sums[index] = '总金额'
            return
          }else if( index=== 3 || index=== 4){  //需要显示总和的列 坐标 : 3 4
          const values = data.map(item => Number(item[column.property]))
          if (!values.every(value => isNaN(value))) {
            sums[index] = values.reduce((prev, curr) => {
              const value = Number(curr)
              if (!isNaN(value)) {
                return prev + curr
              } else {
                return prev
              }
            }, 0)
          } else {
            sums[index] = 'N/A'
          }
          }
        })
        return sums
 }
  
  const tableData: Product[] = [
    {
      id: '12987122',
      name: 'Tom',
      amount1: '234',
      amount2: '3.2',
      amount3: 10,
    },
    {
      id: '12987123',
      name: 'Tom',
      amount1: '165',
      amount2: '4.43',
      amount3: 12,
    },
    {
      id: '12987124',
      name: 'Tom',
      amount1: '324',
      amount2: '1.9',
      amount3: 9,
    },
    {
      id: '12987125',
      name: 'Tom',
      amount1: '621',
      amount2: '2.2',
      amount3: 17,
    },
    {
      id: '12987126',
      name: 'Tom',
      amount1: '539',
      amount2: '4.1',
      amount3: 15,
    },
  ]
  </script>