数据千分位，逗号间隔

//千分位
    numFormat(row) {
      let num = "";
      if (row) {
        if (row == 0) {
          num = 0;
        } else {
          num = Number(row)
            .toFixed(2)
            .toString()
            .replace(/(\d{1,3})(?=(\d{3})+(?:$|\.))/g, "$1,");
        }
      }
      return num;
    }