An example of iteratively reading a CSV file using the popular 'csv' library

csv-parse-example.js

// https://dev.to/maheshkay/read-csv-file-using-node-js-29oc

const parse = require('csv-parse')
const fs = require('fs')
const { createReadStream } = fs

module.exports = async FILEPATH => {
  const contents = []
  await new Promise((resolve, reject) => {
    createReadStream(FILEPATH)
      .pipe(parse({ delimiter: ',' }))
      .on('data', data => contents.push(data))
      .on('error', err => reject('ReadStream error: ' + err))
      .on('end', resolve)
  })
  return contents
}