ElementPlus表格自定义合计列composition

这个composition api的主要目的就是只要提供列名，就让这一列合计

export const useGetSummaries = (props: string[]) => <Data extends Record<string, unknown>>(param: SummaryMethodProps<Data>) => {
  const { columns, data } = param;
  const sums: string[] = [];
  if (!data) {
    return sums;
  }
  columns.forEach((column, index) => {
    if (index === 0) {
      sums[index] = '合计';
      return;
    }
    if (!props.includes(column.property)) {
      return;
    }
    const values = data.map((item) => Number(item[column.property]));
    if (!values.every((value) => Number.isNaN(value))) {
      sums[index] = `${values.reduce((prev, curr) => {
        const value = Number(curr);
        if (!Number.isNaN(value)) {
          return prev + curr;
        }
        return prev;
      }, 0)}`;
    } else {
      sums[index] = 'N/A';
    }
  });

  return sums;
};