csv-stringify promisified wrapper

csv-writer.js

import * as stringify from 'csv-stringify'

module.exports = function (delimiter = ',') {
  const data = []
  const result = {str: undefined}

  const stringifier = stringify({
    delimiter
  })

  stringifier.on('readable', () => {
    let row
    while ((row = stringifier.read())) {
      data.push(row)
    }
  })

  stringifier.on('error', error => {
    console.error('CSV Error "on":', error.message)
    throw error
  })

  stringifier.on('finish', () => {
    result.str = data.join('')
  })

  function setHeaders(headers) {
    stringifier.write(headers)
  }

  function setRow(row) {
    stringifier.write(row)
  }

  async function close() {
    return new Promise(resolve => {
      const afterFinish = () => resolve(result.str)
      stringifier.end(afterFinish)
    })
  }

  return {
    close,
    setHeaders,
    setRow
  }
}

example.js

const csvInit = require('./csv-writer.js')

const writer = csvInit()
writer.setHeaders(['Name', 'Age'])
writer.setRow(['Steve', 12])
const userCSV = await writer.close()
console.log({userCSV})