なんか\r\nを\nで分割することの危険性をいい感じに証明するやつ

csvToJson.js

/**
 * CSVからJsonを作成する
 * @param {String} csv
 * @return {Json}
 */
const generateCsvToJson = (csv) =>
{
  const csvLineList = csv.split('\n');
  const columnNameList = [];
  const resultArray = [];
  for (const [index, line] of csvLineList.entries()) {
      if (!line || !line.trim()) {
          continue;
      }
      const columnList = line.split(',');
      if (index === 0) {
          for (const column of columnList) {
              columnNameList.push(column);
          }
          continue;
      }

      const node = {};
      for (const [columnIndex, column] of columnList.entries()) {
          node[columnNameList[columnIndex]] = column;
      }

      resultArray.push(node);
  }

  return resultArray;
}

const x = "receive_date,shipped_date,pref_code,shipping_code\r\n2022-08-01 11:00:00,2022-08-02 16:35:00,1,e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855\r\n2022-08-03 15:00:00,2022-08-04 18:29:00,2,60303ae22b998861bce3b28f33eec1be758a213c86c93c076dbe9f558c11c752\r\n";

const json = generateCsvToJson(x);
console.log(json);

console.log(json[0]['shipping_code']);

/*
実行結果:
cocoalix@Aki:~/winhome/Documents$ node -v
v16.13.1
cocoalix@Aki:~/winhome/Documents$ node csvToJson.js
[
  {
    receive_date: '2022-08-01 11:00:00',
    shipped_date: '2022-08-02 16:35:00',
    pref_code: '1',
    'shipping_code\r': 'e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855\r'
  },
  {
    receive_date: '2022-08-03 15:00:00',
    shipped_date: '2022-08-04 18:29:00',
    pref_code: '2',
    'shipping_code\r': '60303ae22b998861bce3b28f33eec1be758a213c86c93c076dbe9f558c11c752\r'
  }
]
undefined
cocoalix@Aki:~/winhome/Documents$
*/