json数组的csv格式是什么，如何转换成json数组，Nodejs

const json2csv = require('json2csv').parse;
const fs = require('fs');

const jsonArray = [
  { name: 'John', age: 30, city: 'New York' },
  { name: 'Jane', age: 25, city: 'London' },
  { name: 'Bob', age: 35, city: 'Paris' }
];

const csv = json2csv(jsonArray);

fs.writeFile('output.csv', csv, (err) => {
  if (err) throw err;
  console.log('CSV file created successfully');
});

"name","age","city"
"John",30,"New York"
"Jane",25,"London"
"Bob",35,"Paris"

const csv = require('csvtojson');
const fs = require('fs');

const csvFilePath = 'input.csv';

csv()
  .fromFile(csvFilePath)
  .then((jsonArray) => {
    console.log(jsonArray);
    fs.writeFile('output.json', JSON.stringify(jsonArray), (err) => {
      if (err) throw err;
      console.log('JSON file created successfully');
    });
  });

[
  { "name": "John", "age": "30", "city": "New York" },
  { "name": "Jane", "age": "25", "city": "London" },
  { "name": "Bob", "age": "35", "city": "Paris" }
]